試題詳解

43. In an engine, 0.25 mol of an ideal diatomic gas in the cylinder expands rapidly adiabatically by the action of a piston. During the expansion, the temperature of the gas drops from 1000 K to 400 K. Which of the following values (in J) is closest to the work that the gas does?
(A)3000
(B)2000
(C)1500
(D)1000
(E)60