Thermodynamics

2‌mol of Hg(g) is combusted in a fixed volume bomb calorimeter with excess of O2 at 298K and 1‌atm into HgO(s). During the reaction, temperature increases from 298.0K to 312.8K. If heat capacity of the bomb calorimeter and enthalpy of formation of Hg(g) are 20.00‌kJ‌K−1 and 61.32‌kJ‌mol−1 at 298K, respectively, the calculated standard molar enthalpy of formation of HgO(s) at 298K2 is X‌kJ‌mol‌m−1. The value of |X| is_____
[Given : Gas constant R=8.3JK−1mol−1 ]