JEE Main · 2024 · 05 Apr 2024 · Shift 2 · Chemical Thermodynamics

Combustion of 1 mole of benzene is expressed at
${\mathrm{C}}_6{\mathrm{H}}_6(1)+\frac{15}{2}{\mathrm{O}}_2(\mathrm{g})\to {\mathrm{CO}}_2(\mathrm{g})+3{\mathrm{H}}_2\mathrm{O}(1)$.
The standard enthalpy of combustion of 2 mol of benzene is $-{}^{\prime }{\mathrm{x}}^{\prime }\mathrm{kJ}$.
$\mathrm{x}=$ ____.
(1) standard Enthalpy of formation of 1 mol of ${\mathrm{C}}_6{\mathrm{H}}_6(1)$, for the reaction 6 C (graphite) $+3{\mathrm{H}}_2(\mathrm{g})\to {\mathrm{C}}_6{\mathrm{H}}_6(1)$ is $48.5\mathrm{kJ}{\mathrm{mol}}^{-1}$.
(2) Standard Enthalpy of formation of 1 mol of ${\mathrm{CO}}_2(\mathrm{g})$, for the reaction $\mathrm{C}($ graphite $)+{\mathrm{O}}_{2(\mathrm{g})}\to {\mathrm{CO}}_2(\mathrm{g})$ is $-393.5\mathrm{kJ}{\mathrm{mol}}^{-1}$.
(3) Standard and Enthalpy of formation of 1 mol of ${\mathrm{H}}_2\mathrm{O}(1)$, for the reaction