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10507067
Equilibrium Revision Mindmap
Description
A level Chemistry (Chapter 19 - Equilibrium) Mind Map on Equilibrium Revision Mindmap, created by Chloe Drewery on 23/09/2017.
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chemistry
chapter 19 - equilibrium
a level
Mind Map by
Chloe Drewery
, updated more than 1 year ago
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Created by
Chloe Drewery
about 7 years ago
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Resource summary
Equilibrium Revision Mindmap
Kp
It is the same as Kc, except Kp is for gases and involves partial pressures instead of concentrations.
Partial Pressure (p) = mole fraction x total pressure.
Kc
This is the equilibrium constant = [products] / [reactants]
Greater than 1, equilibrium lies to the right.
Less than 1, equilibrium lies to the left.
=0, equilibrium lies directly in the middle.
Effect of Temperature
Changing the temperature causes the value of Kc/Kp to change as temperature is a condition.
For an exothermic reaction: increasing temperature causes K to decrease. Decreasing temperature causes K to increase.
For an endothermic reaction: increasing temperature causes K to increase. Decreasing temperature causes K to decrease.
Effect of Concentration
Changing concentration doesn't affect the value of Kc.
Effect of Pressure
Changing pressure doesn't affect the value of Kc.
Effect of Catalyst
Adding a catalyst doesn't affect the value of Kc.
Equilibrium
Homogeneous: all species are in the same state.
Heterogeneous: species which make up the reactants and products are in different physical states.
An equilibrium is where the rate of the forwards reaction is equal to the reverse.
Requires: A closed system and a reversible reaction.
Le Chatelier's Principle: When a system at equilibrium is disturbed, equilibrium shifts to oppose this change.
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