Ue kirchoffs law to calculate vaph the molar enthalpy of

Question

Use Kirchoff's law to calculate ?vapH , the molar enthalpy of vaporization, of a substance at 218.15 K, given that its standard enthalpy of vaporization is ?vapH=32.45 kJ mol at 25.0ºC. The heat capacities are Cp,m liq= 46.20 J K?1 mol?1 for the liquid and Cp,m vap = 32.50 J K?1 mol?1 for the vapor.