1.00litre sample of a mixture of CH_(4(g)) and O_(2(g)) measured at 25^(@)C and 740 t or r was allowed to react at constant pressure in a calorimeter which together with its contents had a heat capacity of 1260cal//K. The complete combustion of the methane toCO_(2) and H_(2)O caused a temperature rise in the calorimeter of 0.667K. What was the mole per cent of CH_(4) in the original mixture ? (DeltaH_(comb.)^(@)(CH_(4))=-215kcal mol^(-1))

1.00litre sample of a mixture of CH_(4(g)) and O_(2(g)) measured at 25

1.	1.00litre sample of a mixture of CH_(4(g)) and O_(2(g)) measured at 25^(@)C and 740 t or r was allowed to react at constant pressure in a calorimeter which together with its contents had a heat capacity of 1260cal//K. The complete combustion of the methane toCO_(2) and H_(2)O caused a temperature rise in the calorimeter of 0.667K. What was the mole per cent of CH_(4) in the original mixture ? (DeltaH_(comb.)^(@)(CH_(4))=-215kcal mol^(-1))
Answer» ANSWER :`9.75%;`