JEE Main 2022 · 26 Jun · Shift 1, Chemistry question 81

For complete combustion of methanol
$$\mathrm{CH_3OH(l)+\tfrac32O_2(g)\rightarrow CO_2(g)+2H_2O(l)}$$
the amount of heat produced as measured by bomb calorimeter is 726 kJ mol$^{-1}$ at 27°C. The enthalpy of combustion for the reaction is $-x$ kJ mol$^{-1}$, where $x$ is ______. (Nearest integer)

(Given : $R=8.3$ J K$^{-1}$ mol$^{-1}$)