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Multiple Choice

Multiple Choice. Chapter 10. 1. If there is no change in the internal energy of a gas, even though energy is transferred to the gas as heat and work, what is the thermodynamic process that the gas undergoes called? A. adiabatic B. isothermal C. isovolumetric D. isobaric .

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Multiple Choice

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  1. Multiple Choice Chapter 10 1. If there is no change in the internal energy of a gas, even though energy is transferred to the gas as heat and work, what is the thermodynamic process that the gas undergoes called? A. adiabatic B. isothermal C. isovolumetric D. isobaric

  2. Multiple Choice, continued Chapter 10 Standardized Test Prep 2. To calculate the efficiency of a heat engine, which thermodynamic property does not need to be known? F. the energy transferred as heat to the engine G. the energy transferred as heat from the engine H. the change in the internal energy of the engine J. the work done by the engine

  3. Multiple Choice, continued Chapter 10 Standardized Test Prep 3. In which of the following processes is no work done? A. Water is boiled in a pressure cooker. B. A refrigerator is used to freeze water. C. An automobile engine operates for several minutes. D. A tire is inflated with an air pump.

  4. Multiple Choice, continued Chapter 10 Standardized Test Prep 4. A thermodynamic process occurs in which the entropy of a system decreases. From the second law of thermodynamics, what can you conclude about the entropy change of the environment? F. The entropy of the environment decreases. G. The entropy of the environment increases. H. The entropy of the environment remains unchanged. J. There is not enough information to state what happens to the environment’s entropy.

  5. Multiple Choice, continued Chapter 10 Standardized Test Prep Use the passage and diagrams to answer questions 5–8. A system consists of steam within the confines of a steam engine, whose cylinder and piston are shown in the figures below. 5. Which of the figures describes a situation in which DU < 0, Q < 0, and W = 0? A. (a) B. (b) C. (c) D. (d)

  6. Multiple Choice, continued Chapter 10 Standardized Test Prep Use the passage and diagrams to answer questions 5–8. A system consists of steam within the confines of a steam engine, whose cylinder and piston are shown in the figures below. 6. Which of the figures describes a situation in which DU > 0, Q = 0, and W < 0? F. (a) G. (b) H. (c) J. (d)

  7. Multiple Choice, continued Chapter 10 Standardized Test Prep Use the passage and diagrams to answer questions 5–8. A system consists of steam within the confines of a steam engine, whose cylinder and piston are shown in the figures below. 7. Which of the figures describes a situation in which DU < 0, Q = 0, and W > 0? A. (a) B. (b) C. (c) D. (d)

  8. Multiple Choice, continued Chapter 10 Standardized Test Prep Use the passage and diagrams to answer questions 5–8. A system consists of steam within the confines of a steam engine, whose cylinder and piston are shown in the figures below. 8. Which of the figures describes a situation in which DU > 0, Q > 0, and W = 0? F. (a) G. (b) H. (c) J. (d)

  9. Multiple Choice, continued Chapter 10 Standardized Test Prep 9. A power plant has a power output of 1055 MW and operates with an efficiency of 0.330. Excess energy is carried away as heat from the plant to a nearby river. How much energy is transferred away from the power plant as heat? A. 0.348  109 J/s B. 0.520  109 J/s C. 0.707  109 J/s D. 2.14  109 J/s

  10. Multiple Choice, continued Chapter 10 Standardized Test Prep 10. How much work must be done by air pumped into a tire if the tire’s volume increases from 0.031 m3 to 0.041 m3 and the net, constant pressure of the air is 300.0 kPa? F. 3.0  102 J G. 3.0  103 J H. 3.0  104 J J. 3.0  105 J

  11. Short Response Chapter 10 Standardized Test Prep Use the passage below to answer questions 11–12. An air conditioner is left running on a table in the middle of the room, so none of the air that passes through the air conditioner is transferred to outside the room. 11. Does passing air through the air conditioner affect the temperature of the room? (Ignore the thermal effects of the motor running the compressor.)

  12. Short Response, continued Chapter 10 Standardized Test Prep Use the passage below to answer questions 11–12. An air conditioner is left running on a table in the middle of the room, so none of the air that passes through the air conditioner is transferred to outside the room. 12. Taking the compressor motor into account, what would happen to the temperature of the room?

  13. Short Response, continued Chapter 10 Standardized Test Prep 13. If 1600 J of energy are transferred as heat to an engine and 1200 J are transferred as heat away from the engine to the surrounding air, what is the efficiency of the engine?

  14. Extended Response Chapter 10 Standardized Test Prep 14. How do the temperature of combustion and the temperatures of coolant and exhaust affect the efficiency of automobile engines?

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