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AIIMS2003ChemistryThermodynamics (C)

One gram sample of NH ₄ NO ₃ is decomposed in a bomb calorimeter. The temperature of the 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 for NH ₄ NO ₃ ?

Options

  1. A-7.53 ~kJ / mol
  2. B-398.1 ~kJ / mol
  3. C-16.1 ~kJ / mol
  4. D-602 ~kJ / mol

Correct answer

D. -602 ~kJ / mol

Step-by-step solution

Heat of decomposition, E=m s T =1 1.23 6.12=7.5276 ~kJ . Molar heat of decomposition for NH ₄ NO ₃ =7.5276 80=602.2 ~kJ / mol

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