Consider the following data Heat of combustion of H_2( g ) =-241.8 kJ mol^-1 Heat of combustion of C ( s ) =-393.5 kJ mol^-1 Heat of combustion of…

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