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Q.

One gram sample of NH4NO3 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 NH4NO3 ?

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a

-16.1kJ /mol

b

-398.1kJ /mol

c

-7.53kJ /mol

d

-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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