Question

The standard enthalpy of formation of benzoic acid, C₆H₅COOH, is −385kJ mol^−1 at 298 K. Calculate the standard enthalpy of combustion of benzoic acid at this temperature, given that the standard enthalpy of formation of liquid water, H₂O is −285.8 kJ mol^−1 and gaseous carbon dioxide, CO₂, is −393.51 kJ mol^−1.

A		−294.3 kJ mol−1
B		−3997kJ mol−1
C		−3227.0 kJ mol−1
D		2282.2 kJ mol−1