5.1.2

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What is the mole fraction of a gas?
Mole fraction = (number of moles of gas) / (total number of moles in gas mixture).
1 of 10
What is partial pressure?
Partial pressure = mole fraction of gas x total pressure.
2 of 10
Can you calculate Kc?
Kc is the equilibrium constant; need to be able to calculate Kc from equilibrium amounts; need to be able to find the units of Kc.
3 of 10
What is a homogenous or heterogeneous equilibrium?
Homogeneous - equilibrium species that all have the same state; heterogeneous - equilibrium species that have different states.
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How is the Kc expression different for homogeneous or heterogeneous equilibrium?
For homogeneous, the Kc expression contains concentrations of all species; in heterogeneous equilibrium, the concentrations of solids and liquids are left out, because they are constant.
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Can you calculate Kp?
Kp is also an equilibrium constant but uses partial pressure instead of concentration; you need to be able to determine the units of Kp.
6 of 10
What is the effect of increasing temperature on equilibrium?
Exothermic - k decreases - equilibrium shifts to the left; opposite for endothermic reactions.
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What is the effect of increasing concentration on equilibrium?
K > expression, so the expression must change quantities in order to equal k again.
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What is the effect of increasing pressure on equilibrium?
K < expression, so the expression must change quantities in order to equal k again; see pink 5.1.2 flashcard 1.
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How does a catalyst affect k?
K is unaffected by a catalyst, as a catalyst changes the speed of a reaction but doesn't affect the position of equilibrium.
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Other cards in this set

Card 2

Front

What is partial pressure?

Back

Partial pressure = mole fraction of gas x total pressure.

Card 3

Front

Can you calculate Kc?

Back

Preview of the front of card 3

Card 4

Front

What is a homogenous or heterogeneous equilibrium?

Back

Preview of the front of card 4

Card 5

Front

How is the Kc expression different for homogeneous or heterogeneous equilibrium?

Back

Preview of the front of card 5
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