Homework Answers
A.) Irreversible process
B.) Isothermal
C.) 
D.) As we know that Carnot efficiency is equal to
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Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what?...
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct...
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct answers. 4 marks a. adiabatic and isothermal paths are most efficient out of all paths. b. the cold reservoir is at 0 K temperature. c. the processes are done reversibly. d. as long as you do work in a cycle, the engine is always going to be efficient. e. the two adiabatic processes where there is no heat lost is the key. f. no...
3. (20 pts) In the Carnot engine (refer to the figure in question 2), an ideal...
3. (20 pts) In the Carnot engine (refer to the figure in question 2), an ideal gas undergoes a cycle of isothermal expansion (A → B), adiabatic expansion (B → C), isothermal compression (C → D), and adiabatic compression (D → A). All processes are assumed to be reversible. The volumes at the points are given that 2VA=VB and VC=2VD. Th is 650 °C and Tc is 30 °C. (1) Calculate the amount of heat added to one mole gas...
4. The pressure-volume diagram below shows a special reversible cycle called the Carnot cycle A mole...
4. The pressure-volume diagram below shows a special reversible cycle called the Carnot cycle A mole of an ideal gas starts off in state 1 in contact with a large thermal reservoir at temperature Th. The gas then undergoes an isothermal expansion from Vi to V2. Upon reaching state 2, the gas container is removed from contact with the thermal reservoir and covered with thermal insulation. Next the gas is allowed to expand adiabatically from V2to Vs. Because the expansion...
Dmole of an ideal gas follows the cycle shown in the figure. 1-2 is isochoric process,...
Dmole of an ideal gas follows the cycle shown in the figure. 1-2 is isochoric process, 2-3 is adiabatic process and 3-1 is isobaric process. Vi, Pi are given; V2-2V, P2- P/3. Determine (according to P1, V1) a) Adiabatic coefficient y and molar specific heats Cv and Cp (from the process 2-3) ? b) The heats from 1-2 and 3-1 processes? c) The thermal efficiency of the engine operating with this cycle. PI P2 V2 VI ..
Dmole of an...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in the figure below). The isothermal expansion and compression processes occur at TH 1400 K and Tc-350 K, respectively. The pressure at the beginning and end of the isothermal compression are p4-100 kPa and pi - 500 kPa, respectively Assume the ideal gas model for the air: ai 0.717 J/g.K Mair- 28.97 g/mol kpv.air 1.4 R 8.314J /(mol K) Adiabatic Isothermal expansion Adiabatic compression Gas...
Please can someone help with these questions 5. Does internal energy depend on path, in other...
Please can someone help with these questions
5. Does internal energy depend on path, in other words how a system got to the state its in? 6. How does the First Law apply to weight gain? 7. What is an irreversible process? 8. Define heat engine 9. Sketch Fig. 15.7 10. Given a plot of pressure vs. volume for a thermodynamic process, how do you find the work done? 2 . (T/F For a thermodynamic process, work and heat are...
Can someone please help out with these questions? Thanks. 1. State the First Law of Thermodynamics...
Can
someone please help out with these questions? Thanks.
1. State the First Law of Thermodynamics 2. What are the sign conventions for the heat O and the work W . How is the First Law related to conservation of energy? 4. Define internal energy 5. Does internal energy depend on path, in other words how a system got to the state its in? 6. How does the First Law apply to weight gain? . What is an irreversible process?...
2. Isochoric/Adiabatic/Isobaric Cycle (10 pts) A heat engine using a monatomic gas follows the cycle shown in the PV diagram to the right. Between stages 1 and 2 the gas is at a constant volume,...
2. Isochoric/Adiabatic/Isobaric Cycle (10 pts) A heat engine using a monatomic gas follows the cycle shown in the PV diagram to the right. Between stages 1 and 2 the gas is at a constant volume, and between 2 and 3 no heat is transferred in or out, between 3 and 1 the pressure is held constant (a) For each stage of this process, calculate in Joules the heat, Q, transferred to the gas, and the work, W, done by the...
PA AQi T =Th AQ19 2 4 3 AQout T= Te V Figure 1: Pressure-volume diagram of the Stirling cycle. (a) A Stirling cycle...
PA AQi T =Th AQ19 2 4 3 AQout T= Te V Figure 1: Pressure-volume diagram of the Stirling cycle. (a) A Stirling cycle consists of two isothermal processes and two isochoricprocesses as shown in Fig. J. The hot reservoir is at temperature T and the cold-reservoir AS at temperaturé T)You may assume that the working fluid is anideal gas with Llegrees of freedom. The compression ratio V2/Vi)i.e. the ratio of the volume of the gas at state 2 to...
A, B , D ,E PLEASE SOLVE THEM ( DETAILED SOLUTION + CLEAR HANDWRITING) In this...
A, B , D ,E PLEASE SOLVE THEM
( DETAILED SOLUTION + CLEAR HANDWRITING)
In this question, assume no changes in Ek or Ep (a) In one cycle of a heat engine: 70 J are input by working, 90 J are output by working, 100 J are input by heating, 80 J are output by heating. Write down which one of the following is true: (A) |Wnet-160 J (B) Iw.et-20 J (C) η-0.25 (b) For a fixed amount of gas,...
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct answers. 4 marks a. adiabatic and isothermal paths are most efficient out of all paths. b. the cold reservoir is at 0 K temperature. c. the processes are done reversibly. d. as long as you do work in a cycle, the engine is always going to be efficient. e. the two adiabatic processes where there is no heat lost is the key. f. no...
4. The pressure-volume diagram below shows a special reversible cycle called the Carnot cycle A mole of an ideal gas starts off in state 1 in contact with a large thermal reservoir at temperature Th. The gas then undergoes an isothermal expansion from Vi to V2. Upon reaching state 2, the gas container is removed from contact with the thermal reservoir and covered with thermal insulation. Next the gas is allowed to expand adiabatically from V2to Vs. Because the expansion...
Dmole of an ideal gas follows the cycle shown in the figure. 1-2 is isochoric process, 2-3 is adiabatic process and 3-1 is isobaric process. Vi, Pi are given; V2-2V, P2- P/3. Determine (according to P1, V1) a) Adiabatic coefficient y and molar specific heats Cv and Cp (from the process 2-3) ? b) The heats from 1-2 and 3-1 processes? c) The thermal efficiency of the engine operating with this cycle. PI P2 V2 VI ..
Dmole of an...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in the figure below). The isothermal expansion and compression processes occur at TH 1400 K and Tc-350 K, respectively. The pressure at the beginning and end of the isothermal compression are p4-100 kPa and pi - 500 kPa, respectively Assume the ideal gas model for the air: ai 0.717 J/g.K Mair- 28.97 g/mol kpv.air 1.4 R 8.314J /(mol K) Adiabatic Isothermal expansion Adiabatic compression Gas...
Please can someone help with these questions
5. Does internal energy depend on path, in other words how a system got to the state its in? 6. How does the First Law apply to weight gain? 7. What is an irreversible process? 8. Define heat engine 9. Sketch Fig. 15.7 10. Given a plot of pressure vs. volume for a thermodynamic process, how do you find the work done? 2 . (T/F For a thermodynamic process, work and heat are...
Can
someone please help out with these questions? Thanks.
1. State the First Law of Thermodynamics 2. What are the sign conventions for the heat O and the work W . How is the First Law related to conservation of energy? 4. Define internal energy 5. Does internal energy depend on path, in other words how a system got to the state its in? 6. How does the First Law apply to weight gain? . What is an irreversible process?...
2. Isochoric/Adiabatic/Isobaric Cycle (10 pts) A heat engine using a monatomic gas follows the cycle shown in the PV diagram to the right. Between stages 1 and 2 the gas is at a constant volume, and between 2 and 3 no heat is transferred in or out, between 3 and 1 the pressure is held constant (a) For each stage of this process, calculate in Joules the heat, Q, transferred to the gas, and the work, W, done by the...
PA AQi T =Th AQ19 2 4 3 AQout T= Te V Figure 1: Pressure-volume diagram of the Stirling cycle. (a) A Stirling cycle consists of two isothermal processes and two isochoricprocesses as shown in Fig. J. The hot reservoir is at temperature T and the cold-reservoir AS at temperaturé T)You may assume that the working fluid is anideal gas with Llegrees of freedom. The compression ratio V2/Vi)i.e. the ratio of the volume of the gas at state 2 to...
A, B , D ,E PLEASE SOLVE THEM
( DETAILED SOLUTION + CLEAR HANDWRITING)
In this question, assume no changes in Ek or Ep (a) In one cycle of a heat engine: 70 J are input by working, 90 J are output by working, 100 J are input by heating, 80 J are output by heating. Write down which one of the following is true: (A) |Wnet-160 J (B) Iw.et-20 J (C) η-0.25 (b) For a fixed amount of gas,...
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