How much heat will be released if 30 g of octane is burned in excess of oxygen?

C8 H18 + 12.5 O2 yields 8CO2 + 9H2O Delta H= -5483.4 kJ

2 answers

You know 5483 kJ is released when burning 114 g octane. So how much is released if you burn 30 g.
56