試題詳解

51. A gas undergoes a reversible thermodynamic cycle composed of two adiabatic processes and two isobaric processes as shown in the figure below. Which of the following statements is true?
(A)The entropy change of the gas in a cycle is zero.
(B)The cyclic process is operated between two heat reservoirs of fixed temperatures.
(C)The work done by the gas in a cycle depends on whether it is monatomic or diatomic gas.
(D)The internal energy of the gas is a constant throughout the process.
(E)The total work done by the system equals the total heat absorbed by the system.