1 mole of propane on combustion at STP

1 mole of propane on combustion at STP gives ‘A’ kilo joules of heat energy. Caliculate the heat libarated when 2.4 ltrs of propane on combustion at STP.

1 mole of propene is 22.4 litres gives ‘A’ KJ of heat at STP.
2.4 litres of propene is 2.4/ 22.4 moles give A/9 KJ of heat at STP.