Tolong bantu jawab ya... pake cara

3. q reaksi = delta h sesudah - delta h sebelum
                  = [( 3 x delta h CO2) + ( 4 x delta h H2O) ] - [( delta h C3H8) -                    (5 delta h O2)]
                 = [( 3 x -394) + ( 4 x -286)] - [( -104) + ( 5 x 0)]
                = [(-1182) + ( -1144) - (-104)
                = -2222 kj/mol