# quiz3 - Name Class Date ID A Thermodynamics Multiple Choice...

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Name: ________________________ Class: ___________________ Date: __________ ID: A 1 Thermodynamics Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. R = 8.31 J/mol K, 4.18 J = 1 cal, c (water) = 1.0 cal/g ____ 1. The work done compressing 0250 moles of gas, isothermally, from 2.5 liters to 0.50 liters at 100ºC is: a. -1.25 × 10 3 J b. -3.35 × 10 4 J c. 4.20 J d. 2.5 × 10 2 J e. None of the above ____ 2. Gas confined by a piston in a heat engine expands at a constant pressure of 3.6 × 10 5 Pa. When 12.0 kcal of heat is added to the gas, it expands from an initial volume of 0.10 m 3 to the final volume of 0.20 m 3 . The change in internal energy of the gas is: a. 1.4 × 10 4 J b. -1.4 × 10 4 J c. -8.6 × 10 4 J d. 8.6 × 10 4 J e. None of the above ____ 3. A sample of ideal gas in a cylinder is compressed adiabatically to one-third its original volume. During the process, 64 J of work is done on the gas. How much heat flows to the gas? a. 64 J b. -64 J c. 32 J d. zero e. None of the above ____ 4. An engine has a maximum theoretical efficiency of 36%. The temperature difference between the input and the output is 432ºC. The temperature of the exhaust is: a. 840º K b. 768º K c. 645º K d. 447º K e. None of the above ____ 5. 0.10 liter of water is slowly heated from 27ºC to 87ºC. The change in entropy is: a. 98 J/K b. 76 J/K c. 57 J/K d. 41 J/K e. None of the above ____ 6. What type of compression is involved in the fire syringe experiment? a. Isothermal b. Adiabatic c. Isobaric d. Isochoric e. non of the above

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Name: ________________________ ID: A 2 ____ 7. A gas expands to twice its volume. The work done by the gas is greatest if the expansion is done__________. a. isothermally b. adiabatically c. at constant pressure d. at constant volume e. none of the above ____ 8. One mole of an ideal gas undergoes an isothermal compression to half its original volume. The change in
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quiz3 - Name Class Date ID A Thermodynamics Multiple Choice...

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