`1.0`litre sample of a mixture of `CH_(4)` and `O_(2)` measured at `25^(@)C` and `740 tor r`, was allowed to react at constant pressure in a calorimeter, together with its contents had a heat capacity of `1260 cal K^(-1)`. The complete combustion of `CH_(4)` to `CO_(2)` and water caused a temperature rise in calorimeter of `0.667K`. Calculate mole `%` of `CH_(4)` in the original mixture. Heat of combustion of `CH_(4)` is `-210.8 kcal. `

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 which together with its content has a heat capacity of 1260 cal/degree. The complete combustion of CH_(4) to CO_(2) and water caused a temperature rise in calorimeter of 0.667K . 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^(@)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 ]

If, combustion of 4g of CH_(4) liberates 2.5kcal of heat, the heat of combustion of CH_(4) is :

If, combustion of 4g of CH_(4) liberates 2.5kcal of heat, the heat of combustion of CH_(4) is :