Question

A 1l sample of a mixture of methane gas and oxygen ,measured at 25c and 740 torr

Answer 1

1.00 l sample of a mixture of CH4(g) and O2(g) measured at 25C 740 torr was allowed to react at constant pressure in a Calorimeter which together with its contents had a heat capacity of 1260 Cal/K. The complete combustion of methane to CO2 H2O caused a temperature rise, in the Calorimeter, of 0.667 K. What was the mole percent of CH4 in the original mixture?

enthalpy change for combustion of CH4 is = -215 Kcal/mol.

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