Consider the following data
Heat of combustion of \( \mathrm{H}_2(g) \) \( = -241.8 \, \mathrm{kJ} \, \mathrm{mol}^{-1} \)
Heat of combustion of \( \mathrm{C}(s) \) \( = -393.5 \, \mathrm{kJ} \, \mathrm{mol}^{-1} \)
Heat of combustion of \( \mathrm{C}_2\mathrm{H}_5\mathrm{OH}(I) \) \( = -1234.7 \, \mathrm{kJ} \, \mathrm{mol}^{-1} \)
The heat of formation of \( \mathrm{C}_2\mathrm{H}_5\mathrm{OH}(I) \) is (\( - \)) \( \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \) \( \mathrm{kJ} \, \mathrm{mol}^{-1} \) (Nearest integer).
