試題詳解

9. For the reaction H₂O(l) → H₂O(g) at 298 K, 1.0 atm, ΔH is more positive than ΔE by 2.5 kJ/mol.
This quantity of energy can be considered to be
(A)the heat flow required to maintain a constant temperature.
(B) the work done in pushing back the atmosphere.
(C) the difference in the H—O bond energy in H₂O(l) compared to H₂O(g)
(D)the value of ΔH itself.
(E) none of these