Chemistry · THERMODYNAMICS

Combustion of 1.0 g of graphite in a bomb calorimeter produces a temperature rise from 298 K to 299 K. If the heat capacity of the calorimeter is \( 20.7\text{ kJ K}^{-1} \), what is the internal energy change (\( \Delta U \)) for the combustion of 1 mol of graphite?

1. A
   \( -20.7\text{ kJ mol}^{-1} \)
2. B
   \( -2.48 \times 10^2\text{ kJ mol}^{-1} \)
3. C
   \( +2.48 \times 10^2\text{ kJ mol}^{-1} \)
4. D
   \( -2.48 \times 10^3\text{ kJ mol}^{-1} \)