問題詳情
60. The PV curve for the van der Waals equation at a fixed temperature is plotted inFig. 13. In this case, the liquid phase can coexist with the gas phase at pressure Pc.The pressure Pc intercepts with the PV curve at three points: a, c, and e,respectively. And the slope of the PV curve vanishes at b and d. Which of thefollowing statements is correct?
(A) For pressure a bit higher than PC, it isimpossible to have a stable gas phase.
(B) For pressure a bit lower than P
C, the gasphase is more stable than the liquid phase.
(C) The region a→ b is the supercooled liquidregion.
(D) The region b → c → d corresponds to afluid with a positive compressibility.
(E) None of the above.參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增