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One gram sample of NH₄NO₃is 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 NH₄NO₃ ?

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-16.1kJ /mol

-398.1kJ /mol

-7.53kJ /mol

-602 kJ /mol

answer is D.

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Detailed Solution

q = ms $∆ T$

heat of decompposition of NH₄NO₃ = 1x 6.12 x1.23 x 80 = -602.208kJ/mole $≅$ -602kJ/mole

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