7. The molar enthalpy of vaporization of benzene at boiling point (353 K) is 7.4 kcal/mol. The molar internal energy change of vaporization is
(A) 7.400 kcal/mol,
(B) 8. 106 kcal/mol,
(C) 6.694 kcal/mol,
(D) 62.47 kcal/mol,
(E) 70.86 kcal/mol.

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統計： A(2), B(0), C(1), D(0), E(0) #2789557