How does breaking off a phosphate group from ATP result in the release of energy? Point A. Bond breaking events are exothermic, therefore breaking off a phosphate group is exothermic. Which of the following statements is correct? I Point Which of the following statements is true? IPoint Thermometer A. The first law of thermodynamics allows us to assume the heat gained by the water jacket is equal to the heat released by the reaction in the bomb calorimeter. B. The temperature increase in the water jacket allows us to calculate the heat released by the chemical reaction in the bomb calorimeter. change of the reaction is equal to the heat change because the volume of the reaction is constant