When 5 litres of a gas mixture of methane and propane is perfectly combusted at $0°\mathrm{C}$ and 1 atmosphere, 16 litres of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in $\mathrm{kJ}\left({\mathrm{\Delta H}}_{\text{comb. }}\left({\mathrm{CH}}_4\right)=890 \mathrm{kJ}{ \mathrm{mol}}^{-1},{\mathrm{\Delta H}}_{\text{comb. }}\left({\mathrm{C}}_3{\mathrm{H}}_8\right)=2220 \mathrm{kJ}{ \mathrm{mol}}^{-1}\right)$is