8. At constant pressure and temperature, in which of the following systems is work done on the system by the surroundings?
(A) CaCO3(s) → CaCO(s) + CO2(g)
(C) Ca3P2(s) + 6H2O(l) → 3Ca(OH)2(s) + 2PH3(g)
(B) CO(g) + H2O(g) → H2(g) + CO2(g)
(D) 2CH3OH(l) +3O2(g) → 2CO2(g) + 4H2O(l)
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統計: A(0), B(0), C(0), D(1), E(0) #3423511
統計: A(0), B(0), C(0), D(1), E(0) #3423511