Chemistry - Thermochemistry Question with Solution | TestHub

The combustion of benzene$\left(\mathrm{l}\right)$gives${\mathrm{CO}}_2\left(\mathrm{g}\right)$and${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right).$Given that heat of combustion of benzene at constant volume is$-3263.9\mathrm{ }\mathrm{kJ}\mathrm{ }{\mathrm{mol}}^{-1}$at$25°\mathrm{C};$the heat of combustion$\left(\mathrm{in}\mathrm{ }\mathrm{kJ}\mathrm{ }{\mathrm{mol}}^{-1}\right)$of benzene at constant pressure will be

$\left(\mathrm{R}=8.314\mathrm{ }{\mathrm{JK}}^{-1}\mathrm{ }{\mathrm{mol}}^{-1}\right)$