1)A Carnot engine takes 3000 J from a reservoir at 600 K, does some work, and discards some heat to a reservoir at 300 K. How much work does it do?

A	1500 J
B	500 J
C	2500 J
D	300 J

2)A 700 g quantity of an ideal gas undergoes a reversible isothermal compression at a temperature of330K.The compression reduces the volume of the gas from0.4m^3initially, to0.15m^3finally. The molecular mass of the gas is38g/molWhat is the entropy change for the gas, in SI units?

A)-150

B)0

C)-57

D)150

E)57

3)A toaster can be considered to be a heat engine that does no work. Heat flows through the toaster coils without being transformed into mechanical energy. What is the thermal effeciency of this example of a heat engine?

A	1
B	0.50
C	0
D	-1

5)A heat engine operates between heat reservoirs of temperatures of440Kand 270 K. With each cycle, the engine performs 3.3 kJ of net work and rejects8.2kJof heat. What is the thermal efficiency of this heat engine?

A	0.34
B	0.29
C	0.26
D	0.32
E	0.23

6)At a nuclear power plant, a steam turbine drives an electrical generator with a mechanical power output of 350 MW. The power input from the nuclear reactor to the steam turbine is 1480 MW. How much power is discarded by the turbine?

A	350 MW
B	1290 MW
C	1130 MW
D	700 MW

7)A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of710Kand270Kperforms 4.1 kJ of net work, and rejects9.7kJ of heat, in a single cycle. What is thermal efficiency of a Carnot heat engine, operating between the same heat reservoirs?

A	37%
B	50%
C	56%
D	43%
E	62%

8)During each cycle, a diesel engine performs 2900 J of mechanical work and discards 4100 J of heat. How much heat must be supplied to the engine in each cycle?

A	4100 J
B	7000 J
C	1200 J
D	2900 J