1.

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)

Answer»

`-7.53` kJ/mol
`-398.1 kJ//mol`
`-16.1` kJ/mol
`-602` kJ/mol

Solution :Molecular WEIGHT of `NH_(4)NO_(3)=80`
Heat EVOLVED = `1.23xx6.12`
`therefore`Molar heat CAPACITY = `1.23xx6.12xx80`
`=-602 kJ//mol`.


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