| A | B |
|---|
| energy | capacity to do work or cause change |
| Work | F x d |
| potential energy | energy of position |
| kinetic energy | energy of motion |
| heat | associated with temperature changes |
| radiant energy | supplied by the sun |
| thermochemistry | study of energy changes |
| kilocalorie | 1 Calorie or 1000 calories |
| joule | unit of heat, energy, work |
| heat capacity | total amount of heat needed to raise the temperature of a substance by 1 degree |
| specific heat | energy needed to raise 1 gram of substance 1 degree Celsius |
| 4.18 joules | equals 1 calorie |
| water | has a high specific heat (4.18 J/g.C)OR 1 cal/g.C |
| Q = (mass)(specific heat)(change in temp) | heat lost or gained |
| molar heat capacity | expressed in J/mol.C |
| endothermic | heat is transfered INTO a system |
| exothermic | heat is transferred OUT of a system |
| enthalpy | heat transferred into or out of a system (H) |
| Hess's Law | "if a reaction is the sum of two or more reactions, the overall "H" must be the sum of the "H's" for each reaction" |
| standard conditions | 1 atm, and 25 degrees celsius |
| standard state | the physical state in which a compound or element is usually found at 1 atm and 25 degrees celsius |
| calorimetry | device used to measure heats of reaction |
| Calorie | =1000 calories or 1 kilocalorie |
