One litre sample of a mixture of `CH_(4)` and `O_(2)` measured at `32^(@)C` and `760` torr, was allowed to react at constant pressure in a calorimeter. The complete combustion of `CH_(4)` to `CO_(2)` and water caused a temperature rise in calorimeter of `1K`. calculate mole `%` of `CH_(4)` in original mixture. [Given: Heat of combustion of `CH_(4)` is `-210.8 Kcal//mol`. Total heat capacity of the calorimeter `= 2108 cal K`]

One litre sample of a mixture of `CH_(4)` and `O_(2)` measured at `32^

1.	One litre sample of a mixture of `CH_(4)` and `O_(2)` measured at `32^(@)C` and `760` torr, was allowed to react at constant pressure in a calorimeter. The complete combustion of `CH_(4)` to `CO_(2)` and water caused a temperature rise in calorimeter of `1K`. calculate mole `%` of `CH_(4)` in original mixture. [Given: Heat of combustion of `CH_(4)` is `-210.8 Kcal//mol`. Total heat capacity of the calorimeter `= 2108 cal K`]
Answer» Correct Answer - `25%` Heat generated `C_(1)DeltaT=1260xx0.667 cal`. `:. n_(CH_(4))=(2.108xx1)/(210.8)=0.01` `n_("total")=(PV)/(RT)=0.04" " :. mol%=(0.01)/(0.04)xx100=25%`

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