Chemistry - Thermochemistry Question with Solution | TestHub

A gas ( Molar mass$=280 \mathrm{g}{ \mathrm{mol}}^{-1}$) was burnt in excess${\mathrm{O}}_2$in a constant volume calorimeter and during combustion the temperature of calorimeter increased from$298.0 \mathrm{K}$to$298.45 \mathrm{K}$. If the heat capacity of calorimeter is$2.5 \mathrm{kJ}{ \mathrm{K}}^{-1}$and enthalpy of combustion of gas is$9 \mathrm{kJ}{ \mathrm{mol}}^{-1}$then amount of gas burnt is____$\mathrm{g}$.