Chemistry

Chemistry

Problem

For a certain liquid, the molar enthalpy of vaporization is + ⁣44  kJ mol−1+\!44\;\text{kJ mol}^{-1} at its boiling point. Which of the following is the molar enthalpy change for the condensation of the vapor at the same temperature and pressure? a) + ⁣44  kJ mol−1+\!44\;\text{kJ mol}^{-1} b) − ⁣44  kJ mol−1-\!44\;\text{kJ mol}^{-1} c) − ⁣22  kJ mol−1-\!22\;\text{kJ mol}^{-1} d) + ⁣22  kJ mol−1+\!22\;\text{kJ mol}^{-1}

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