A chemist wants to calibrate a new bomb calorimeter. She completely burns 0.930 g of carbon in the calorimeter. The temperature of the calorimeter changes from 25.00 C to 28.15 C. If the molar enthalpy of combustion of carbon is 394 kJ/mol, what is the heat capacity of the new calorimeter? What experimental evidence shows that this reaction is exothermic?