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Heat

vocab 7

TermDefinition
Chemical potential energy The energy stored in the chemical bonds of a substance
Endothermic process Heat is absorbed from the surroundings. The system gains heat as surroundings lose heat. (Positive sign, feels cold)
Enthalpy Accounts for the heat flow of the system at constant pressure
Exothermic process Heat is released to its surroundings. The system loses heat as surroundings gain heat. (Negative signs, feel hot)
Heat Energy that transfers from one object to another because of a temperature difference between the objects
Law of conservation of energy States that in any chemical or physical process, energy is neither created or destroyed
Molar heat of fusion The heat absorbed by one mole of solid substance as it melts to a liquid at a constant temperature
Molar heat of vaporization The amount of heat required to vaporize one mole of a given liquid at a constant temperature
Specific heat The amount of heat it takes to raise the temperature of 1g of the substance at 1 degree C
Standard Heat of Formation The change in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states
Activated Complex An unstable arrangement of atoms that forms for a moment at the peak of the activation energy barrier
Activation Energy The minimum energy that colliding particles must have in order to react.
Catalyst A substance that speeds up the reaction but is not used up in the reaction. Lowers the activation energy of a reaction, allowing the reaction to occur faster, does not change the energy of the reactants or products
Created by: abbeebrandow
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