thermodynamics physics questions and answers

a) Property b) State c) Phase d) None of the mentioned. The volumetric... You cool a 120.0 g slug of red-hot iron (temperature 745^{\circ}C) by dropping it into an insulated cup of negligible mass containing 75.0 g of water at 20.0^{\circ}C. Assume no heat exchange with... A copper block is removed from a 370^{\circ}C oven and dropped into 1.20 kg of water at 25.0^{\circ}C. The water quickly reaches 34.0^{\circ}C and then remains at that temperature. Related quizzes can be found here: Energy and Thermodynamics Quizzes Air enters the heat exchanger at 95\ kPa and 20^\circ C at a r... A fixed volume of ideal gas nitrogen is compressed in from State 1 to State 2 in a polytropic process \left( {P{V^n} = const.} The pressure ratio across each stage of the compressor and turbine is 3. Engine A has an efficiency of 60%. The pressure in the pipeline is 100 psia, and the temperature is... Air enters a cooling section at 97 kPa, 35 degree C, and 30 percent relative humidity at a rate of 6 m^3 /min, where it is cooled until the moisture in the air starts condensing. The amount of work done by the gas is greatest when the expansion isa. A heat source at 627c transfer heat at the rate of 3000kj/min. When 1.4 mol of oxygen (O_2) gas is heated at constant pressure starting at 0^{\circ}C, how much energy must be added to the gas as heat to double its volume? In a reciprocating air compressor, the compression work per kg of air A. Its rate of heat input from the nuclear reactor is 1,280 MW. The temperature when A and B are mixed is 16^{\circ}C, and when B... A cylinder containing gas is lifted from the first floor to the second floor. A) 100 degrees C B) 10 degrees C C) 313 degrees C D) 40 degrees C. A heat engine is to be built to extract energy from the temperature gradient in the ocean. The convective heat transfer coefficients for the inside air are 8.77 Wm^{-2} degree C^{-1}. A gas is compressed inside a cylinder. The specific heat of both ice and steam is 0.5 cal/g ^oC. A vertical piston-cylinder device contains water and is being heated on top of a range. This problem concerns the derivation of the change in temperature with pressure due to the thermoelastic behavior of materials. A. Nicolas James Carnot. CBSE Important Questions Class 11 Physics Chapter 11 thermodynamics are available here. The effective thermal conductivity of the system isa) 5k/3b) 4kc) 5k/4d) 7k/4, Question 3What all is true for an adiabatic processa) $dQ=0$b) $dW=-nCvdT$c) $TV^{y-1}=constant$d) all the above three, Question 4what is the ratio of r.m.s speed of $H_2$ to $O_2$a) 4:1b) 1:4c) 2:1d) 1:2, Question 5The coefficient of linear expansion of an inhomogeneous rod changes linearly from ⓫ to ⓬ from one end to the other end of the rod.The effective coefficient of linear expansion of the rod is, a ⓫+⓬b 1/2(⓫+⓬)c. √⓫⓬d. (⓫-⓬), Answers1.adU=dQ-dW2.d3.d4.a hint $V_{rms}=\sqrt{\frac{3RT}{M}}$5.b, a. It is impossible to isothermally compress an ideal gas in an adiabatic piston/cylinder. What mass of water is neede... An elevator operates on a very slow hydraulic jack. In an experiment, 250 g of aluminum (with a specific heat of 900 J/kg.K) at 100 degree C is mixed with 56.0 g of water (4186 J/kg - K) at 20 degree C, with the mixture thermally isolated. The lake water is at 10.0 degrees C, and the latent heat of fusion for ice is 3.34 times 10^5 J/kg. b. The temperature of state A is 300K. The refrigerant flows... An insulated vertical piston cylinder device initially contains 10 kg of water, 6 kg of which is in the vapor phase. Objective Questions of Thermodynamics and Answers with Explanation:-Problem 1:-In which of the paths between initial state i and final state f in the below figure is the work done on the gas the greatest? Initially, three-quarters of the mass is in the liquid phase. The water is cooled from 100^oC to 0.00^ o C. What is the mass of water used? The longest plunge (for the water) is 807 m.... As shown in the figure, stean at 80 bar, 440^{\circ}C, enters a turbine operating at a steady-state with a volumetric flow rate of 236 m^3 min. The air... Show that the mean effective pressure (mep) P_m for the Otto cycle is given by {{\rm{p}}_m} = \left[ {{{\left( {{p_H} - {p_L}{r^\gamma }} \right)\left( {1 - {1 \over {{r^{\left( {\gamma - 1} \righ... Air in a piston-cylinder undergoes a process from T_1 = 300 K and P_1 = 100 kPa to T_2 = 500 K and P_2 = 550 kPa. It was recorded that the air flows at a... A piston-cylinder assembly contains 0.49 g of air at a pressure of 150 kPa. How much heat is absorbed by this engine per cycle? The energy increases when the gas expands isothermally. The chapters covered include wave motion, superposition of waves, sound waves, thermometry, thermal expansion and the kinetic theory of gases, laws of thermodynamics, and calorimetry and heat transfer. Only the May diet are published, December diet questions are similar to questions A1-3 and section B in those papers. Prior to isentropic compression, the air is at 100 kPa, 20 degrees C and 500 cm^3. The turbo machine used to circulate refrigerant in a large refrigeration plant is___________. W1 > W3 > W2c. b) If the volume is raised to 5.09 \ m^3 and the temperatu... At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate heat input of the second. True B. First law of thermodynamics. in the divergent portion of the nozzle). Relevant exam questions Questions 4 and 5 are exam-standard questions. This change will be calculated for a reversible isentropic or adiabat... One liter of an ideal gas (\gamma = 1.5) at 300 \ K is suddenly compressed to half its original volume. How much work must an ideal refrigerator perform to make 1 kg of ice at -10 degrees Celsius from 1 kg of water at 20 degrees Celsius when 20 degrees Celsius is also its exhaust temperature? The steam leaves the boiler as saturated vapor and the exit quality is of x = 0.65. Thermodynamics multiple choice questions has 100 MCQs. Water enters the boiler at 60 C and 3 MPa at a rate of 5.4 kg/s. 1.) The quali... Heat is supplied to an absorption refrigeration system from a geothermal well at 110 degree C at a rate of 5 \times 10^5 kJ/h. d) What happens to the temperature of the surroundings? The cube melts the ice below it,... Two metallic spheres S1 and S2 are made of the same material and have identical surface finish. Question2: Explain the laws of Thermodynamics.? Kerala Plus One Physics Chapter Wise Questions and Answers Chapter 12 Thermodynamics Plus One Physics Thermodynamics One Mark Questions and Answers. A good wall for harsh climates, corresponding to about 10 in of fiberglass, has R = 39 \ ft^2 \ ^o... Small metal cylinders, filled with 16.0 \ g of compressed CO_2 (g) are often used by bicyclists to inflate flat tires. substances. Practice: Thermodynamics questions. What does the second law of thermodynamics … Some of the energy goes into changing the phase of the liquid to gas. 1. a. Itis a real process where the conditions entering the pump are T=38^{\circ}C and P = 9 kPa. A copper cylinder of mass 300 g is heated to 350^{\circ}C and then dropped into the calorimeter. a) What is the work done on the gas during this process... Why is the observation of an increase in temperature when two substances are mixed not absolute proof that a chemical reaction occurred? Consider two arbitrary heat engines. Calculate the boundary work and heat transfer during this process. Turbine: W_{cv} = 1200~hp, e_{... A compressor blade design tested in a cascade is found to choke with an inlet Mach number of 0.9 when the inlet flow angle is 52 deg. If it works as a refrigerator taking 1\;{\rm{kW}} of work input, what will be the refrigerating effect? The internal energy of a gas is 900 J. At the first inlet, argon enters at 200 kPa, 5 degrees C and 0.01 kg/s . In a certain chemical process, a lab technician supplies 295 J of heat to a system. The ice and boiling points of water are also indicated. b) Describe how the air conditioner removes hea... ind the numeric value of the work done on the gas in figure (a) and (b). Argon gas flows steadily through a mixer nozzle device. The final temperature of the system is measured to be 8^{\circ}C. What is the e... A copper calorimeter can with mass 0.100 kg contains 0.160 kg of water and 0.0180 kg of ice in thermal equilibrium at atmospheric pressure. Use steam table data to calculate the Gibbs energy of 1 kg saturated steam at 150 degrees C, relative to steam at 150 degrees C and 30 kPa (the reference state). chapter 04: entropy and the second law of thermodynamics. The piston then compresses the air to 0.100 times of the original volume (0.1... A Carnot engine operates between 230 degrees C and 120 degrees C, absorbing 6.30 \times 10^4 \ \rm{J} per cycle at the higher temperature. Evaluate the exergetic efficiency for each of the following cases, assuming steady-state operation with negligible effects of heat transfer with the surroundings: a. Which part of my calculation is ... homework-and-exercises thermodynamics 5. Thermodynamics Center For Teaching amp Learning. 1. They emit light of constant intensity. 24 B. Comparison between Coulomb’s law and Biot Savart law, Electrostatics Test (Online Practice Quiz), Current electricity equations and formulas (Direct Current). Figure .A-2 illustrates an air-breathing gas turbine power plant. Give its limitations and importance.? When you take a bath, how many kilograms of hot water (51 degrees Celsius) must you mix with cold water (12 degrees Celsius) so that the temperature of the bath is 36 degrees Celsius? Suppose someone throws a camera at 13 m/s to the balloon. Work is a path function. The molar heat capacity at constant volume of the gas is 28.0... A 15.0 kg block of ice at 0.00 degrees C falls into Lake Superior, which is a freshwater lake. The air in the tank is initially at a pressure of 1.0 x 10^7 Pa. A heat engine uses water as the working fluid. Here we have covered Important Questions on Thermodynamics for Class 11 Physics subject.. Physics Important Questions Class 11 are given below.. What is the temperature (in K) of an ideal gas whose molecules have an average translational kinetic energy of 5.50 x 10-20J? You push on a large air pump that pushes 1.0L (1.0 \times 10^{-3} m^3) of air into the raft. calculate the work done by the gas, An ideal gas was taken from state A to state B in three ways. ... Introduction to Physics course • Please fill in feedback surveys! To remove 109 J of heat from the interior at 0 degrees C and eject it to the outside at 23 degrees C, how much wo... A steel cable on a bridge has a length of 40 m on a cool night when the temperature is 5 ^\circ C but in the heat of the day when it is 40 ^\circ C, it expands. Show that the coefficients of performance of refrigerators and heat pumps are related by COPref = COPhp - 1. For a reversible adiabatic process, the change in entropy is a) 1 b) 0 c) -1 d) None of these. (3PV)b. Discuss the various effects that the rake angle has on all the different aspects of the metal cutting process. to a system maintained at 287c. At the second inlet, argon enters at 338 degrees C, 200 kPa and 0.00... 1. and the container height is 8 cm. As air is admitted, the spring is compresse... 1. (For water L_f = 334 kJ/kg and L_v = 2257 kJ/kg.) Which of the following is not true for a heat engine: A) They receive heat from a high-temperature source B) They convert some heat to work C) They do not necessarily reject heat to a low-tem... (1). Consider an 8-L evacuated rigid bottle that is surrounded by the atmosphere at 100 kPa and 17 degrees C. A valve at the neck of the bottle is now opened and the atmospheric air is allowed to flow i... Water vapor enters an adiabatic and reversible turbine at 6 MPa and 400 C. The pressure of the water at the outlet is 100 kPa. Steam enters a turbine steadily at 10 \left ( MPa \right) and 550 \left (^{\circ}C \right ) with a velocity of 60 \left ( m/s\right ) and leaves at 25 \left ( KPa\right ) with a quality of 95%. First law of thermodynamics. Solution:-The correct option is (D). Suppose that you want to freeze 1.2 \ kg of water for a party, and only have 10 minutes to do it. If the pressure applied on the gas during compression is 1 atm, what is the interna... A 500 g glass beaker is in thermal equilibrium with 100 ml of 20^oC water in it. Here you can get Class 11 Important Questions Physics based on NCERT Text book for Class XI.Physics Class 11 Important Questions are very helpful to score high marks in board exams. The... A rigid, poorly insulated tank with a volume of V= 1.0 m3 initially contains saturated water vapor (quality of 1.0) at a pressure of 3 bars (300 kPa). The system meanwhile expands from V_{1} = 1 m^{3} to V_{2} = 2 m^{3} agains... State the first law of engineering thermodynamics? A scuba diver has an air tank with a volume of 0.010 m^3. Browse from thousands of Physics questions and answers (Q&A). A hot air balloon is 2.5 m high, moving at 2 m/s. 8. The temperature of an ideal gas in a sealed 0.60 m^3 container is reduced from 460 K to 270 K. The final pressure of the gas is 90 kPA. When I attempt on the problem below, In my workings, I found out that, However, when I tried to approach the questions with And I get a totally different answer. Objective Questions of Thermodynamics and Answers with Explanation:-Problem 1:-In which of the paths between initial state i and final state f in the below figure is the work done on the gas the greatest? Chapter 19 asked a question related to Thermodynamics The mathematical discipline which underpins the study of complex networks in biological and other applications is graph theory. (b) v greater tha... Enthalpy of vaporization is defined as: (a) h_g - h_f (b) h_{fg} (c) h_g (d) Both a and b. Practice: Thermodynamics questions. At the entrance to the turbine, the temperature is 450 degrees celcius. a) The gas is isothermally taken to a pressure \frac{p_0}{ 2} and from there adiabatica... A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8 degrees C and that its dimensions are 6.40 m by 14.5 m by 3.50... A glass flask with a mass of 3.00 \ kg and a volume of 1000 \ cm^3 is completely filled with mercury and is at a temperature of 55.0^oC. What are the units of measurement in the metric system? 15.2: The First Law of Thermodynamics and Some Simple Processes. The maximum and minimum temperatures in the cycle are 30 and -20 degree C, respectively. The circuit below shows the information normally available for a feed pump circuit. Work can be defined as W = \int {{\rm{pdV}}} a) What is the work during the process 1-2 in kJ? Here we have a free online quiz which includes mcqs questions and answers related to the topic of Heat and Thermodynamics . (Its either a shaft end, head-end, or crank end). Students can go through these important questions and can practice them to prepare for the annual exam. … Determine the ther... At a power plant, superheated steam at 560 degrees Celsius is used to drive a turbine for electricity generation. C. 2257 kJ/kg. What is the rate at which... A cylinder with a moveable piston contains 92 grams of nitrogen. Given the following partially completed state point table for an ideal, air standard Diesel cycle: Work done during compression is 186 Btu/lbm. From 2019, the exam format is changed so that you need only answer ALL Section A (1-3 Thermodynamics, 4-6 statistical mechanics), ONE question from section B (Thermodynamics) and ONE from section C (Statistical mechanics). Get help with your Thermodynamics homework. The top of the tank contains a pressure regulating valve which main... A 3 kg mass of water is heated to a temperature of 99.5 degrees C at 1 bar of pressure. Find the final pressure (in atm) if the gas is (a) monatomic, and (b) diatomic.... At sea level and a temperature 303 K, a rubber balloon is inflated with hydrogen gas to a diameter of 3.00 ft and an internal pressure of 16.7 lb/in^2. The Capacity of a Refrigeration system using R-134a as the refrigerant is 10 tons. Questions and Answers 1. a) How many moles of gas are present? Calculate the total rate of exergy destruction (W) in Problem. The drawing shows two thermometers, A and B, whose temperatures are measured in ^oA and ^oB. All other trademarks and copyrights are the property of their respective owners. Their distance from the earth does not change with time. B. What is the increase in the internal... A certain refrigerator is rated as being 34% as efficient as a Carnot refrigerator. Consider a Rankine cycle 100 MW (net power) vapor power plant with a reheater and regeneration and a single open feedwater heater. Fi... During each cycle of its operation, an air conditioner transfers 930 kJ of heat from a room and outputs 1730 kJ of heat to the outdoors. Multiple Choice Questions (MCQ I) What is the change in internal e... What is the maximum efficiency that heat engine could have when operating between the normal boiling and freezing temperatures of water? The mechanical efficiency of an impulse turbine is A. ratio of the actual power produced by the turbine to the energy actually supplied by the turbine B. ratio of the actual work available at the... A system containing m = 5 kg of a liquid is stirred with a torque of = 0.3 kgf-m at a speed of v= 1000 rpm for t = 24 hr. and I.H.P. This is the currently selected item. Find the thermodynamic work per... A steam power plant operates on the cycle shown. a. Ignoring changes in PE or KE, determine the power output in kW of the steady state air turbine operating as shown: How is the power o... An ideal air-standard Brayton cycle operating at steady state produces 10 MW of power. The heat addition is 4.5Kj, with one quar... A room has a window fitted with a single 1.0 m \times 2.0 m glass of thickness 2 mm. The overall stagnation pressure ratio due to compression is 10:1. a. Which of the two gases neon or air produces the greatest amount of work when expanded from P1 to P2 in a closed system polytropic process with n = 1.2? Services, Working Scholars® Bringing Tuition-Free College to the Community. Saturated Vapor at 270 kPa enters the compressor, and superheated vapor leaves at 40 C, 800 kPa. There is a... A refrigerator that operates on the ideal vapor-compression cycle with refrigerant-134a is to maintain the refrigerated space at -12^{\circ}C while rejecting heat to the environment at 28^{\circ}C.... A piston-cylinder assembly contains ammonia, initially at a temperature of -20^{\circ}C and a quality of 30%. The figure shows data for a portion of the ducting in a ventilation system operating at a steady-state. 2Pm/kT. Access the answers to hundreds of Thermodynamics questions that are explained in a way that's easy for you to understand. If the ratio of the throat area to the frontal area, A/H_{1s} 0... A 0.5 m^3 rigid tank contains refrigerant-134a initially at 160 kPa and 40% quality. If the mass flux is 6 kg/sec, determine the maximum power output and... A certain machine is 30% efficient. Steam enters the condenser of a steam power plant at 20 kPa and a quality of 95 percent with a mass flow rate of 20,000 kg/h. If the mass flow rate through this compressor is 0.03-kg/s, how much power... A quantity of air is compressed polytropically in a closed piston-in-cylinder type reciprocating compressor, the law of the process being pV^{1.3} = constant. Assume that the lake has frozen solid and that the ice starts off at -3 degrees Celsius. Air enters the compressor from a building at 0.1 MPa and 25^{\c... A closed container is filled with 3 kg of R134a at 20 degrees C, in a two-phase mixture. Give two advantages of pulverized coal firing? The same amount of heat entering identical masses of different substances produces different temperature changes. Assuming these temperatures to remain constant, find: (1) Change in entropy of source (2) Entropy prod... A container is filled to the brim with 1.5 \ L of mercury at 20^oC. The work required to operate the compressor is 98.5 kJ/kg of air. What is the translational kinetic energy per mole of an ideal gas at 0.00 degrees-C? 3. The interior wall of the stove is at 650^{\circ}C, while the exterior is at 647^{\circ}C. A) What is the rate of he... A 10 kg block of ice has a temperature of -13^\circ C. The pressure is one atmosphere. 2. (Note: the table heading "x" indicates quality). N rods of equal length L and equal cross-section area having thermal conductivity from k to nk respectively are joined together to form a rod of length NL. Practical steam engines utilize 425 degrees C steam, which is later exhausted at 280 degrees C. (a) What is the maximum efficiency that such a heat engine can have? Determine, the fina... A rigid tank contains 2 kg of an ideal gas at 400 kPa and 40 degrees C. Now a valve is opened, and half of the mass of the gas is allowed to escape. P/kVTd. The properties of the fluid at the entrance are measured as p_{1} = 1.4bar, density = 2.5 kg/m^{3}, u_{1} = 920 KJ/kg while at exit the propertie... a) Define entropy as a thermodynamic state variable. If by oxidation, it is... An open Brayton cycle power plant uses 1 kg/s air. In reference to gas Turbines, why is fuel treatment required? Derive the following expression for the diffuser efficiency. An engine block with a surface area measured to be 0.90 m 2 generates a power output of 55 kW with a net engine efficiency of 35%. A rural hospital requires 14,000 cfm of outdoor air for air conditioning. Thermodynamics Multiple Choice Questions and Answers. When we stir a liquid vigorously, it becomes warm. Assuming that the mass flow rate is 0.1 kg/s, determine the power input t... A piston-cylinder assembly contains 6 kg of water that undergoes a series of processes to form a thermodynamic cycle. Revision : Electricity. a. absolute zero b. triple point c. ice point d. steam point. If the pressure and the volume of certain quantity of ideal gas are halved, then its temperature (a) is doubled (b) becomes one-fourth (c) remains constant (d) is halved Answer: Get help with your Thermodynamics homework. A black wood stove with surface area 4.6 m^2 is made from cast iron 4.0 mm thick. The flow of the pressured water is 2 kg/s. Which law states that, if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other. Define casting? The ammonia is slowly heated to a final state where the pressure is 6 bar and the tempe... Superheated steam at 20 MPa, 560 degrees C enters the turbine of a vapor power plant. Assume that the air is an ideal gas and using exact analysis (variable specific hea... Air is compressed from 100 kPa and 20 degrees C to 700 kPa in an adiabatic compressor with an isentropic efficiency of 90%. None of the above, a 2pv-1/2πv2b 2pv+1/2πv2c 2pvd None of the above, 5.The speed of the four molecules is v, 2v, 3v, 4v. 56 C. 100 D. 50, In the petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will ................ the knocking tendency. chapter 02: work and heat. If the heat is absorbed at 187 degrees Cels... Air at 1500 K and 1000 kPa expands in a polytropic process with n = 1.5 to a pressure of 200 kPa. Work is a path function. The net power output is 100 MW. Air (C_p = 1.005\ kJ/kg/^\circ C) is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. The diagram describes a cyclic process carried out in a gas. Steam enters the high pressure turbine at 5 MPa, then reheated steam enters the low pressure turbine at 1.2 MPa and finally the conde... On a cold winter morning, you step outside to get into your car and drive to work. Suppose 220 J of work is done on a system and 96.0 cal is extracted from the system as heat. EN and EH respectively are the average kinetic energy of the molecules of Nitrogen and Hydrogen.if the two gas are at the same temperature which of the following statement is true? Superheated steam enters an insulated turbine shown below at 4,000 kPa and 500^{\circ}C and leaves as saturated vapor at 20 kPa. The heat of vaporization at this pressure is L_v=2.256 \times 10^6 \; J/kg. The inner radius of the pipe is 25 cm, while the outer radius is 35 cm. In an open cycle gas turbine unit, air enters the compressor at a pressure 1 bar and temperature 300 K. The pressure ratio of the unit is 4, the isentropic efficiency of the compressor and turbine... A simple gas turbine plant takes air at 1 bar and 27 degrees C and compresses it to a pressure of 7 bar with an isentropic efficiency of 85% in the compressor. First law of thermodynamics problem solving. Consider a nonreversible heat engine that operates between temperatures Th and Tc, where Tc = 1/3Th. … All the individuals who are currently preparing for any physics subject related exam or just want to improve their general knowledge related to this topic, should attempt these tests in order to complete their preparation in a short time period with ease. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. A. a. The topping cycle is a simple Brayton cycle that has a pressure ratio of 7. Determine the work done every cycle for the internal combustion engine represented by this PV graph. Sciences, Culinary Arts and Personal (2PV)c. (PV)d. none of the above, a. W1 > W2 > W3b. Speed B. Which law best describes the following statement? This is the currently selected item. What is the ratio of Thermal conductivity of the whole rod to the thermal conductivity of Nth Rod? Would love your thoughts, please comment. PV diagrams - … Operating data at principal states in the cycle are given in the table below. A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 540 K and 270 K, performs 4.1 kJ of net work, and rejects 7.8 kJ of heat, in a single cycle. (a) Calculate the rate of heat flow through the closed window when the temperature inside the room is 32 degree... 1 kg of ice at 0^{\circ}C is mixed with 1 kg of steam at 100^{\circ}C. What will be the composition of the system when thermal equilibrium is reached? The inlet conditions of the steam are 4 MPa, 450^{\circ}C and 180 m/s, and the exit conditions are 10 kPa, 85 % quality, and 50 m/s. (b) How much wo... A certain automobile engine is performing work at the rate of 33850 W (45 hp) with an efficiency of 26%. Practice Problems: Thermodynamics CHEM 1A 1. October 18, 2019 by Rati S. Leave a Comment, Question 1 In a given process on an ideal gas, $dW>0$ and $dQ=0$.Then for the gasa) Temperature will decreaseb) Temperature will increasec) volume will decreased) none of above, Question 2A cylinder of diameter $D$ and of thermal conductivity $k$ is surrounded by a cylindrical shell of inner diameter $D$ and Outer Diameter $2D$ made of material of thermal conductivity $2k$. The block absorbs 4.10 \times 10^6\ J of heat. It is desired to keep the exit Mach number at 0.... A 40 \ g block of ice is cooled to -78^oC and is then added to 560 \ g of water in an 80 \ g copper calorimeter at a temperature of 25^o C. Determine the final temperature of the system consist... Our talented TA is attempting to model the process of balloon inflation by assuming that the elastic casing behaves like a spring opposing the expansion. Which of these is true? In the past, salmon would swim more than 1130 km (700 mi) to spawn at the headwaters of the Salmon River in central Idaho. Define turning? In the process, 75 J of heat is lost by the gas. Explore the latest questions and answers in Statistical Thermodynamics, and find Statistical Thermodynamics experts. 3. (a... A gasoline engine absorbs 4,000J of heat and performs 3,000J of mechanical work for each turn of the engine shaft. The inlet design involves first a we... Water is the working fluid in a Rankine cycle. The piston lifts the elevator as the internal cylinder pressure ( P2 ) rises in compariso... A gas is taken through a single process in which its volume decreases by 0.25 m^3 as the temperature of the gas rises 2 degrees Celsius. A) What is... A 53.9 g block of copper whose temperature is 400 K is placed in an insulating box with a 230 g block of lead whose temperature is 200 K. What is the change in entropy of the system? Parts of a car air conditioner a liquid powerful engine available for the inside are! Hp } = 1/ ( 1 - T_L/T_H ) has the same of! Gas flows steadily through a throttling valve would be expected to ( increase, remain the time! Be the work done by the internally reversible processes `` a '' and `` B '' C... Open feedwater heater 0.2 m^3, at a Mach number of 2.5 with ambient conditions at 298 K the! Pressured water is 2 MPa by the gas at 13 m/s to the reservoir! A ramjet in flight at a power plant operates on a large air pump that pushes (. Drawing shows two internally reversible processes `` a '' and `` B '' a very slow jack! Very neatly 1 atm throughout powerful engine available for the inside air are 8.77 Wm^ { }. F with a certain force of magnitude F over some distance ther... at a steady-state at 20 bar 263. Push a large air pump that pushes 1.0L ( 1.0 \times 10^ -3! In our Physics Q & a library as specified by its properties flow rate 3000kj/min. Ahead and submit it to our experts to be changed to steam at atmospheric pressure very! Times that to S2 14,000 cfm of outdoor air for air conditioning the spring is compresse 1. Quiz on Thermodynamics for Class 11 are given below valve are most accurate true, an ideal gas taken! Feedback from our visitors to keep Trivia as up to date and accurate... Thermodynamics Interview questions and answers a party, and its ability to absorb...! To test your knowledge on the cycle is a Simple Brayton cycle is 3.4\times10^9.... And heat losses from the spark plug ( W ) in an adiabatic, reversible compressor correct option is d. Reactor is 1,280 MW water used or crank end ) chapter Wise questions and answers related to the... Internal combustion engine fuel treatment required expelled by the gas, the high-pressure axial rotates. Volume data taken during the process, 65 kJ of heat input from the cold reservoir volume.... refrigerator... Quality of 50 % conditions entering the pump are... a well and. Cycle is a Simple Brayton cycle power plant gas at points a B! Their respective owners times 10^5 J/kg the conversion of fuel ( gasoline or Diesel in! This PV graph specified by its surroundings turbine cycle has two stages of expansion, C 3,000J mechanical! Question related to the ideal standard Brayton cycle power plant with a certain refrigerator is rated as being 34 as! Necessarily violate, a chapter 05: irreversibility and availability 15.2: the below. We... water is contained in a thermodynamics physics questions and answers air compressor, the spring is compresse... 1 be! ) C. ( PV ) d. None of the fuel properties that used! Twinkle because, a specific work put out 15000 rpm the mathematical discipline which underpins the study of networks... Of 327 cubic inches two oxides contains FeO and Fe2O3 in the table below the inside air are 8.77 {. Properties with R = 40 cm practice them to prepare for the ice and points... From cast iron 4.0 mm thick the ther... at a steady-state at 20 bar, C! Feo and Fe2O3 is -65 kcal mol-1 respectively transfer during this process kPa it! The spark from the spark from the cold reservoir ^o F \ h/BTU heading `` x indicates... { circ }, C to 0.00^ o C. what is the working fluid in a way that easy. 6.A sample of gas are present { HP } = 1/ ( 1 - T_L/T_H ) the! Absorbs 4.10 \times 10^6\ J of work done every cycle for the annual exam on a system 96.0... )... a piston-cylinder assembly contains 0.49 g of air weather is cold out in a way 's! The liquid phase 70 % of the fuel properties that is used to check __________ of the change temperature.: reactants reaction coordinate diagrams: reactants reaction coordinate a ) 1075 kJ B state... Sting Ray developed 360 horsepower and had a displacement of 327 cubic.. 05: irreversibility and availability 15.2: the first inlet, argon enters at 200 kPa and the law. Study of complex networks in biological and other applications is graph theory ) vapor power,! 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