1.

In a calorimeter, the temperature of the calorimeter increases by 6.12 K, the heat capacity of the systemm is 1.23 kJ/g/deg. What is the molar heat of decomposition for the ammonium nitrate?

Answer»

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

SOLUTION :Molecular WEIGHT of `NH_(4)NO_(3)=80" g "mol^(-1)`
Heat evolved=`1.23xx6.12`
Molar heat of decomposition`=1.23xx6.12xx80`
`=602" kJ "mol^(-1)"(as heat is evolved)" `,brgt `=-602kJ" "mol^(-1)`


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