A slice of banana mass 2.502 g was burnt in a bomb calorimeter producing a temperature rise of 3.05°C. The combustion of 0.316 g of benzoic acid in the same calorimeter produced a temperature rise of 3.24°C. The heat of combustion of benzoic acid at constant volume is −3227kJ mol−1. If average banana mass is 125 g, how many calories can be obtained from one average banana?