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# Quiz4b - Exam Phys 2C Quiz 4 Name MULTIPLE CHOICE Choose...

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Exam Phys 2C, Quiz 4 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Figure 19.1 1) In Fig. 19.1, the net work done by the gas during the cycle is closest to: A)4.00 kJ B)8.00 kJ C)12.0 kJ D)20.0 kJ E)16.0 kJ 2) An adiabatic compression is performed on an ideal gas. The final pressure is equal to 0.56 times the initial pressure and the final volume equals 1.50 times the initial volume. The adiabatic constant for the gas is closest to: 3) A Carnot engine is operated as a heat pump to heat a room in the winter. The heat pump delivers heat to the room at the rate of 43 kJ per second and maintains the room at a temperature of 293 K when the outside temperature is 249 K. The power requirement for the heat pump under these operating conditions, in SI units, is closest to: 4) A Carnot cycle heat engine works between a hot reservoir at 650 K and cold reservoir at 303 K, using 3 mol of an ideal gas. During the isothermal expansion part of the cycle, the gas expands from an initial volume of 40 L to a final volume of 120 L. How much heat, in kJ, is rejected to the cold resevoir during one cylce of the engine? 5) A power plant outputs 10 7 W of power operating at an efficeincy of 32%. What is the rate, in kg/sec, at which this plant uses cooling water , assuming an average 6 °C rise in cooling - water temperature? The denisty of water is 1000 kg/m 3 , its thermal conductivity is 0.6 W/(m · K), and specific heat is 4180 J/(kg · K) A)1250 B)850 C)400 D)130 E)585 A-1

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6) Which of the following is a WRONG statement? 7) Which of the following is a WRONG statement?
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