| A | B |
|---|
| calorie | non-SI energy unit = to 4.184 J, this is the amount of energy needed to raise the temp. of water one degree Celcius |
| calorimeter | measures specific heat, heat of vaporization and the heat of fusion. It minimizes the transfer of heat to the surroundings. Means "heat measurer" |
| enthalpy change | a measure of the heat change accompanying a chemical reaction at a standard pressure, symbolized by delta H |
| heat | energy that is transferred from one object to another |
| heat of fusion | the quantity of heat needed to melt one gram of a solid into it's liquid form, ,measured in J/g |
| heat of vaporization | the quantity of heat that must be absorbed to vaporize one gram of a liquid, measured in J/g |
| specific heat | the quantity of heat needed to raise on gram of a substance one degree Celcius. SI unit is in J/g*C |
| standard enthalpy of formation | amount of energy involved in the change of each substance in the formation of a compound |
| surroundings | for example, the test tube and air surrounding the products and reactants in a chemical reaction |
| system | the reactants and the products in a test-tube reaction |
| temperature | measure of and proportional to heat, the average kinetic energy of particles |
| thermochemistry | the study of heat transfers that accompany chemical reactions |
| enthalpy | the measure of the energy content of a system |
| exothermic reaction | one in which energy is lost or given off |
| endothermic reaction | one in which energy is absorbed |
