Mothballs are composed primarily of the hydrocarbon naphthalene(C10H8). When 1.025 g of naphthalene is burned in a bombcalorimeter, the temperature rises from 24.25 ?C to 32.33 ?C.
Find ?Erxn for the combustion of naphthalene. The heatcapacity of the calorimeter, determined in a separate experiment,is 5.11kJ/?C.
Express the change in energy in kilojoules per mole to threesignificant figures.