| A | B |
| Name | Definition |
| Activation Energy | Amount of energy needed to start a chemical reaction |
| Calorimetry | Measuring heat transfer within a system or process |
| Chemical Change | Change that affects the atoms, resulting in a new substance |
| Chemical Energy | Energy found in the bonds between atoms |
| Chemical Reaction | Bonds breaking and reforming, making a new substance |
| Closed System | System in which matter cannot pass, but energy can |
| Electrical Energy | Energy generated by the flow of electrons |
| Endothermic | Heat is required for, or absorbed by, a chemical reaction |
| Energy | Ability to move or change matter (Do Work) |
| Energy Diagram | Picture representing the energy of a chemical reaction over time |
| Energy of Reaction (Enthalpy) | Net change of energy within a reaction |
| Exothermic | Heat is released from a chemical reaction |
| Free Energy | Energy available to do work from a chemical reaction |
| Gravitational Energy | Energy based on the location of matter relative to distance and mass |
| Isolated System | System in which neither matter and energy can pass |
| Kinetic Energy | Energy based on movement |
| Light Energy | Energy wave able to be visually perceived |
| Mechanical Energy | Energy of the moving parts of the machine |
| Nuclear Energy | Energy found within the nucleus of an atom |
| Open System | System in which both matter and energy can pass |
| Physical Change | Change that does not affect the atoms, often easy to reverse |
| Potential Energy | Energy that can be stored (or possible energy) |
| Reversible Reaction | Reaction in which the products can reform the reactants |
| Sound Energy | Energy wave able to be audibly perceived |
| Surroundings | Everything outside the system (distance does matter) |
| System | Area under observation |
| Temperature | Average kinetic energy of an object or area. (Speed of Particles) |
| Thermal Energy (Heat) | Energy transferred by a difference in temperature |
| Transition State | Time when products are first discovered in a chemical reaction |
| Wind Energy | Energy caused by the movement of gases in a direction |