Question

One gram sample of $NH_{4}NO_{3}$ is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12K. The heat capacity of the system is 1.23kJ/g/deg. What is the molar heat of decomposition for $NH_{4}NO_{3}.$

• A. – 7.53 kJ/mole
• B. – $398.1kJ/mole$
• C. $- 16.1kJ/mole$
• D. $- 602kJ/mole$

Answer 1

Answer: (A)

– 7.53 kJ/mole

Answer 2

Heat evolved = 1.23× 6.12

$\therefore$ Molar heat capacity = $1.23 \times 6.12 = 7.5276$

Molar heat of decomposition $= - 7.53kJ/mole$