JEE Main 2022 · 26 Jul · Shift 1, Chemistry question 84

2.4 g coal is burnt in a bomb calorimeter in excess of oxygen at 298 K and 1 atm pressure. The temperature of the calorimeter rises from 298 K to 300 K. The enthalpy change during the combustion of coal is $-x$ kJ mol$^{-1}$. The value of $x$ is ______. (Nearest Integer)

(Given : Heat capacity of bomb calorimeter 20.0 kJ K$^{-1}$. Assume coal to be pure carbon)