| A | B |
|---|
| Joule | the SI unit of energy |
| Exothermic | a process that loses heat to the surroundings |
| Enthalpy | the heat content of a substance |
| Hess's law of heat summation | two or more thermochemical equations give a final equation, their heat changes can be added for the final heat change |
| Endothermic | a process in which heat is absorbed from the surroundings |
| Chemical potential energy | energy stored in the chemical bonds of a substance |
| Surroundings | everything else in the universe minus the system being focused on |
| Thermochemical equation | a chemical equation that includes the enthalpy change |
| System | the part of the universe on which a scientist focuses their attention |
| Thermochemistry | the study of energy changes that occur during chemical reactions and changes of state |
| Heat | the sum of the kinetic energies of all the particles in a sample |
| Temperature | is proportional to the average kinetic energy of the particles |
| Specific Heat Capacity | the amount of heat energy required to raise the temperature of 1.00g of the substance by 1.00K |
| Absolute Zero | the temperature at which the kinetic energy of the particles is zero |
| Molar Heat of Fusion | the energy required to change one mole of a substance from a solid to a liquid at the melting point |
| Molar Heat of Vaporisation | the energy required to change one mole of a substance from a liquid to a gas at the boiling point |
| Standard Enthalpy (Heat) of Combustion | the enthalpy change when one mole of the substance is completely burnt, with all reactants and products in their standard states |
| Standard Enthalpy (Heat) of Formation | enthalpy change that accompanies the formation of 1 mole of a compound from its elements, with all substances in their standard states |
| Absolute Temperature | temperature on the Kelvin Scale |
| Bond Energy | a measure of intra-molecular bond strength in a covalent molecule |
