Compute the heat of formation of liquid methyl alcohol in kilojoule per mol, using the following data. Heat of vaporisation of liquid methyl alcohol = 38 kJ/mol. Heat of formation of gaseous atoms from the elements in their standard states : H, 218 kJ/mol; C, 715 kJ/mol; O, 249 kJ/mol. Average bond energies : C—H, 415 kJ/mol; C—O, 356 kJ/mol; O—H, 463 kJ/mol.