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Equilibrium

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Equilibrium

5/22/14

THE Isaiah Stubbs (GREATNESS) aka ZEH

Irmak, Lindsay, Lily, Elijah, Muhammad, Pooja, & Romario

- Chemical equilibrium- the state in which forward and reverse reactions balance each other when they occur in equal rates
- Le Chatelier’s Principle- states that if a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress

- Three stresses of a chemical system:
- Temperature change
- Pressure change
- Concentration of products and reactants
- If a concentration of a substance is increased, equilibrium will shift to the opposite side.
- If a concentration of a substance is decreased, equilibrium will shift to that side

Keq= (C) / (A) (B)

Keq>1 = more products than reactants

Keq<1 = more reactants than products

Can only be gas or aqueous, can’t be a solid!

c

a

b

Ex: N2+ 3H2 2NH3 +(Heat)

- If you increase temperature, there will be more reactants produced.

N2 + 3H2 2NH3

- If you add more N2 or H2 you get more products:
- N2+N2+ 3H22NH3

- If you remove N2 or H2 you get more reactants:
- 3H 2NH3

- Only applies to gases and aqueous solutions
- To calculate moles of each side, add the coefficients on the reactants side together, and the coefficients on the products side together
- If you increase pressure on the side with more moles, equilibrium will shift to the other side

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