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unit 7

Entropy measure of degree of randomness as particles move; more random more entropy
Energy Change using Hess's law; process equals the sum of the energy difference of products minus the sum of the energy difference of the reactants
Chemical Equilibrium Rate of forward reaction equals rate of reverse reaction and the concentrations of products and reactants remain unchanged
Activated Complex the maximum energy point along the reaction path
Activation Energy the minimum energy that must be input to a chemical system with potential reactants to cause a chemical reaction
Collision Theory qualitatively explains how chemical reactions occur and why reaction rates differ for different reactions
Catalyst a substance that speeds up a chemical reaction, but is not consumed by the reaction
Reversible reaction Products can react to re-form the reactants
(change in) H enthalpy of products - enthalpy of reactants
Hess's Law Overall enthalpy change in a reaction is equal to the sum of the enthalpy changes for the individual steps in the process.
Endothermic Heat energy is absorbed; products higher
Exothermic Heat energy is absorbed; products higher
Created by: skylarsan123