Chapter 18

One hundred joules of heat is added to a system that performs 60 joules of work. The internal energy change of the system is a. 0 J b. 40 J c. 60 J d. 100 J

B. 40 J

Suppose the temperature of the input reservoir in a heat engine doesn't change. As the sink temperature is lowered, the efficiency a. increases b. decreases c. stays the same

a. increases

Suppose you put a closed, sealed can of air on a hot stove burner. The contained air will undergo an increase in a. internal energy, temperature and pressure b. temperature c. pressure d. internal energy e. temperature and pressure

a. internal energy, temperature and pressure

The lowest temperature possible in nature is a. 0 degrees C b. -273 degrees C c. 4 K

b. -273 degrees C

Entropy is closely related to a. 1st law of thermodynamics b. 2nd law of thermodynamics c. both d. neither

b. 2nd law of thermodynamics

During an adiabatic compression of an ideal gas a. the internal energy of the gas remains constant b. the temperature of the gas does not change c. no heat is supplied to or removed from the gas d. no work is done on the gas

c. no heat is supplied to or removed from the gas

The first law of thermodynamics is a restatement of the a. principle of entropy b. law of heat addition c. Carnot cycle d. conservation of energy

d. conservation of energy