試題詳解

1. Consider a system consisting of the following apparatus, in which gas is confined in flask A and there is a vacuum in flask B. The flasks are separated by a valve. A B Assuming that the flasks are perfectly insulated and will not allow the flow of heat into or out of the flasks to the surroundings. When the valve is opened, gas flows from flask A to flask B. Which of the following5 atm Evacuated statements regarding this process is correct?

(A) No work is performed during the expansion of the gas.
(B) The gas expansion is a nonspontaneous process.
(C) The driving force for this process is enthalpy change.
(D) The internal energy change (ΔΕ) for this expansion process is ＞ 0.
(E) The entropy change of the surrounding (ASsurr) for this process is ＞ 0.