GENCHEM2 (Chapter 15)

Chapter 15

K_c

aA+bB—>cC+dD

[C]^c[D]^d

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[A]^a[B]^b

K_c>1 products

K_c<1 reactants

Allowed in K_c

ONLY GASES OR AQ

K_p

aA+bB—>cC+dD

(P_C)^c(P_D)^d

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(P_A)^a(P_B)^b

ICE

I-Initially

C-Change

E-Equilibrum

Le Chatelier’s Principle

Change in Temp, Conc, Volume

Change in Temp

Increasing Temp

• If (-)Exothermic towards the reactants

• If (+) Endothermic towards the produces

Decreasing Temp

• If (-) Exothermic towards the produces

• If (+) Endothermic towards the reactants

Change in the Volume

Increasing volume

• sided with more moles

Decreasing volume

• sided with less moles

Change in Conc

Remove

• the side it was removed from

Added

• to the opposite it was added to

Add something new

• no change

Catalyst

K_c>1 it is a catalyst

K_c<1 it can’t be a catalyst