Serway_CP_poll_ch12

Serway_CP_poll_ch12 - A 4 mole ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment How much

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Unformatted text preview: A 4 mole ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment. How much heat is received by the system? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. -20 J 2. zero 3. +5 J 4. +20 J A 5 mole ideal gas system undergoes an adiabatic free expansion, going from an initial volume of 10 liters to a final volume of 20 liters. How much work is done by the system during this adiabatic free expansion? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. -50 J 2. -10 J 3. zero 4. +50 J A heat engine receives 6000 J of heat from its combustion process and loses 4000 J through the exhaust and friction. What is its efficiency? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 33% 2. 40% 3. 67% 4. 73% If a heat engine has an efficiency of 30% and its power output is 600 W, what is the rate of heat input from the combustion phase? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1800 W 2. 2400 W 3. 2000 W 4. 3000 W A steam turbine operates at a boiler temperature of 450 K and an exhaust temperature of 300 K. What is the maximum theoretical efficiency of this system? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 24 2. 50 3. 33 4. 67 A 4 mole ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment. What is its change in internal energy? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. -20 J 2. -5 J 3. zero 4. +20 J The maximum theoretical thermodynamic efficiency of a heat engine operating between hot and cold reservoirs is a function of which of the following? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. hot reservoir temperature only 2. cold reservoir temperature only 3. both hot and cold reservoir temperatures 4. none of these choices are valid During an isobaric process which one of the following does not change? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. volume 2. temperature 3. internal energy 4. pressure A 2 mole ideal gas system is maintained at a constant volume of 4 liters; if 100 J of heat is added, what is the work done by the system?added, what is the work done by the system?...
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This note was uploaded on 01/19/2010 for the course PHYS 200 taught by Professor Davies during the Spring '08 term at Roger Williams.

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Serway_CP_poll_ch12 - A 4 mole ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment How much

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