Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.422g Find rH for the combustion of naphthalene at 298K. of naphthalene burns in a bomb calorimeter, the Express your answer using four significant figures. temperature rises from 26.312C to 32.632C. Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.422g Find rH for the combustion of naphthalene at 298K. of naphthalene burns in a bomb calorimeter, the Express your answer using four significant figures. temperature rises from 26.312C to 32.632C