JEE (Main)-2023 : Phase-1 (25-01-2023)-Evening

Consider a mixture of CH4 and C2H4 having volume 16.8 L at 273 K and 1 atm. It undergoes combustion to form CO2 with total volume 28 L at the same temperature and pressure. If the enthalpy of combustion of CH4 is -900 kJ/mol and enthalpy of combustion of C2H4 is -1400 kJ/mol then find the magnitude of heat released on combustion of given mixture in kJ