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chem test 67
| Question | Answer |
|---|---|
| law of conservation | energy cannot be created or destroyed, only transferred from one form to another |
| potential energy | energy due to position or composition |
| kinetic energy | energy due to movement |
| temperature | the measurement of the random motion |
| heat | the transfer of energy due to temp difference |
| energy | the ability to do work or create heat |
| work | force over distance |
| endothermic reaction | energy enters the system and the surroundings get cold |
| exothermic reaction | energy exits the system and the surroundings get hot |
| calorimeter | device used to calculate heat produced during chemical or physical change |
| formula to find delta E | triangle E = w + q |
| q and w | negative KJ |
| T final= | triangle T + original T |
| formula for enthalpy | given g / molar mass x deltaH (enthalpy change) |
| deltaH= | mols reacted x deltaH reaction |
| if the system has work done | it is positive |
| if the system does work | it is negative |
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Birdie27!