Question

The combustion of one mole of benzene takes place at 298 K and 1 atm. After combustion, CO₂ (g)and H₂O (l) are produced and 3267.0 kJ of heat is liberated. Calculate the standard enthalpy of formation, Δ_f H° of benzene. Standard enthalpies of formation of CO₂ (g) and H₂O (1) are -393.5 kJ mol^-1 and -285.83 kJ mol^-1, respectively.

Answer 1

The formation reaction of benzene is given as below –

The enthalpy of combustion of 1 mole of benzene is:

The enthalpy of formation of 1 mol of CO_2(g);

The enthalpy of formation of 1 mol of H₂O_(l) in: