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Worked Examples Follow:

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CRS Questions Follow:

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When G = 0,

1. The equilibrium constant is 1.

2. The system has reached equilibrium.

3. The reaction will be too slow to observe.

4. All of the above are correct.

5. 1 and 2 above are both correct.

Sys

tem

free

ene

rgy,

G

Reactants Products

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When G = 0,

1. The equilibrium constant is 1.

2. The system has reached equilibrium.

3. The reaction will be too slow to observe.

4. All of the above are correct.

5. 1 and 2 above are both correct.

Sys

tem

free

ene

rgy,

G

Reactants(std state)

Products(std state)

Q>K

Q=K

Q<K

Go

equilibrium

G = G(P)-G(R) = 0

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1. favors reactants at all temperatures.

2. favors products at all temperatures.

3. favors reactants high temperatures only

4. favors products at high temperatures only.

5. It is impossible to choose between the above responses without thermochemical data.

2 4 2N O (g) 2NO (g)

The equilibrium constant for the decomposition of colorless dinitrogen tetroxide to form brown nitrogen dioxide

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1. favors reactants at all temperatures.

2. favors products at all temperatures.

3. favors reactants high temperatures only

4. favors products at high temperatures only.

5. It is impossible to choose between the above responses without thermochemical data.

2 4 2N O (g) 2NO (g)

The equilibrium constant for the decomposition of colorless dinitrogen tetroxide to form brown nitrogen dioxide

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Try these end of chapter exercises starting on page 813:

# 5, 7, 11, 15, 23, 25, 35, 39, 43, 45, 55, 57, 61, 95, 96, 97, 98, 99