Under constant-volume conditions, the heat of combustion of benzoic acid (c6h5cooh) is 26.38 kj/g. a 2.600-g sample of benzoic acid is burned in a bomb calorimeter. the temperature of the calorimeter increases from 21.90°c to 29.74°c. (a) what is the total heat capacity of the calorimeter? kj/°c (b) a 1.290-g sample of a new organic substance is combusted in the same calorimeter. the temperature of the calorimeter increases from 22.50°c to 28.76°c. what is the heat of combustion per gram of the new substance? kj/g