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Chemical Equilibrium
Chemical Equilibrium
9
Chemistry
Undergraduate 2
10/01/2012

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Term
Chemical Equilibrium
Definition

Dynamic Equilibrium

forward and reverse reaction are proceeding at the same rate or speed

Term
Law of Mass Action (Guldberg & Waage, 1864)
Definition
Values for the equilibrium expression are constand for a particular reaction at a given temp
Term
Homogeneous Equilibria
Definition
Involve components in only one phase
Term
Heterogeneous Equilibria
Definition
Involve components in more than one phase
Term
La Chatelier's Principle
Definition
When a system at equilibrium is disturbed by a change of temp, pressure, or concentration, the equilibrium shifts so as to counteract the effect of the disturbance.
Term

Adding a substance

(to a system at equilibrium)

 

Definition
will make the reaction move to take away some of that substance
Term

Removing a substance 

(from a system at equilibrium)

Definition
will make the reaction move to form more of that substance
Term
Exothermic Reaction
Definition
reactions == products + heat
Term
Endothermic Reaction
Definition
Reactions + heat == products
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