題組內容

四 、(16%) In the pressure-volume diagram, when an ideal gas moves from A to C along the dashed path, the change in its internal energy is -36 J.

(d) (4%) Suppose the molar specific heat at constant volume of the gas is Cv = 3R/2, with the gas constant R. If the dashed path from A to C is an adiabatic process, what is the ratio VC/VDbetween the volume Vc at C and VD at D? (Note:61b8026915e07.jpg are horizontal

lines, while61b802992ed80.jpg are perpendicular lines.)