Question

Ethanol burns completely in oxygen, producing carbon dioxide and water vapour. The molar enthalpy of combustion of ethanol in these conditions is -1234.8 kJ/mol. Determine the molar enthalpy of formation of ethanol.

Answer 1

C2H5OH + 3O2 -----> 2CO2 + 3H2O

$∆H_f=-277.7kJ.mol^{-1}$