One gram sample of ammonium nitrate is decomposed in a bomb calorimeter. The temperature of calorimeter increases by 6.12 K. The heat capacity of the system is 1.23 `kJ//g//deg`. What is the molar heat of decomposition of `NH_(4)NO_(3)`
A. `- 7.53 kJ mol^(-1)`
B. `- 398.1 kJ mol^(-1)`
C. `- 16.1 kJ mol^(-1)`
D. `- 602 kJ mol^(-1)`
