| A | B |
|---|
| Thermochemistry | the branch of chemistry dealing with the relationship between chemical action and heat. |
| Energy | the capacity for doing work; it exists in several forms, including chemical, nuclear, electrical, radiant, mechanical, and thermal energies |
| Chemical potential energy | energy stored within the structural units of chemical substances |
| Heat | the energy that is transferred from one body to another because of a temperature difference |
| System | any part of the universe upon which attention is focused |
| Surroundings | the remainder of the universe that is outsid the system |
| Universe | the totality of all existing things |
| Law of conservation of energy | energy is neither created nor destroyed in an ordinary chemical or physical process |
| Endothermic process | a heat-absorbing process |
| Exothermic process | a heat-dissipating process |
| Calorie | the quantity of heat that raises the temperature of 1 g of pure water |
| Joule | the SI unit of energy |
| Heat capacity | the quantity of heat required to change an object's temperature by exactly 1 degree Celsius |
| Specific heat capacity | the quantity of heat, in joules or calories, required to raise the temperature of 1 g of a substance 1 degrees Celsius |
| Heat of combustion | the heat released during a chemical reaction in which on mole of a substance is completely burned |
| Calorimetry | a device for measurement heat changes |
| Calorimeter | a device for measuring of heat changes for physical and chemical processes |
| Enthalpy (H) | the heat content of a system at constant pressure |
| Thermochemical equation | a chemical equation that includes the amount of heat produced or absorbed during the reaction |
| Heat of reaction | the heat released or absorbed during a chemical reaction |
