Identify the correct equilibrium expression for the reaction
Question 2 options:

A)

B)

C)

D)

E)
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Question 3 (0.34 points) Question 3 Unsaved
The reaction 2 NOCl(g) double arrow 2NO(g)+Cl2(g) has an equilibrium constant, K, of 3.9×10-3 at 4575K.
When [NOCl] = 3.40×10-3M, [NO] = 1.90×10-3 M, and [Cl2] = 2.10×10-3 M, is the reaction at equilibrium? If not, which way will the reaction proceed?

Question 3 options:

A) Q
B) Q> K, shift L (reaction forms reactants)

C) Q
D) Q>K, shift R (reaction forms products)

E) Q=K, (reaction is at equilibrium)
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Question 4 (0.34 points) Question 4 Saved
The reaction is at equilibrium and the following concentrations are found in a sealed flask:
[SO2] = 5.70 × 10 -2
[O2] = 9.30 × 10-3 M
[SO3] = 9.50 × 10-2 M

What is the value of the equilibrium constant?

Question 4 options:

A) 300

B) 180

C) 3.40 × 10-3

D) 5.60 × 10-3

E) 17
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Question 5 (0.34 points) Question 5 Unsaved
Consider the following reaction:

.

An equilibrium mixture of N2, H2, and NH3 at 500 K contains 0.020 M N2and 0.18 M H2. What is the concentration (M) of NH3?

Question 5 options:

A) 1.98 × 10-2

B) 1.41 × 10-1

C) 217

D) 6.12 × 10-1

E) 7.82 × 10-1
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Question 6 (0.34 points) Question 6 Unsaved
The equilibrium constant, Kp, has a value of 7.4 x 10-5 at 75°C for the rxn

At 75°C, what is the value of Kc?

Question 6 options:

A) 2.6 x10-6

B) 5.1 x 10-6

C) 2.1 x 10-3

D) 4.6 x 10-4

E) 7.4 x 10-5
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Question 7 (0.34 points) Question 7 Unsaved
The equilibrium constant, Kp, has a value of 3.4 x 10-5 at 245°C for the rxn



What is the value of Kcat 245°C?

Question 7 options:

A) 1.4 x 10-3

B) 6.8 x 10-4

C) 6.1 x 10-2

D) 1.7 x 10-1

E) 3.4 x 10-5
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Question 8 (0.34 points) Question 8 Unsaved
The equilibrium constant Kc = 4.05 x 10-3 at 100K for the rxn

What is Kp?

Question 8 options:

A) 4.05 x 10-3

B) 1.66

C) 2.73 x 10-1

D) 4.93 x 10-4

E) 2.47 x 102
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Question 9 (0.34 points) Question 9 Unsaved
The reaction is allowed to react by placing 0.843 M N2O and 0.593 M O2 in a flask. At equilibrium [NO2] = 0.436 M, what are the concentrations (M) of N2O and O2, respectively?

Question 9 options:

A) 0.843, 0.593

B) 0.734, 0.484

C) 0.625, 0.266

D) 0.831, 0.591

E) 0.407, 0.157
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Question 10 (0.34 points) Question 10 Unsaved
What is the equilibrium constant, Kc, for the prior problem?
Question 10 options:

A) 4.92

B) 2.62

C) 0.381

D) 0.203

E) 0.217
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Question 11 (0.34 points) Question 11 Unsaved
Consider the following reaction:



What is K´ for the reaction ?

Question 11 options:

A) 16.9

B) 71.1

C) 1.19 × 10-1

D) 1.41 × 10-2

E) 5.93 × 10-2
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Question 12 (0.34 points) Question 12 Unsaved
Given reaction:
Which way will the reaction shift if the temperature is decreased?

Question 12 options:

A) The exothermic reaction will shift right.

B) The exothermic reaction will shift left.

C) The endothermic reaction will shift right.

D) The endothermic reaction will shift left.

E) Changing the temperature will have no effect on the equilibrium expression.
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Question 13 (0.34 points) Question 13 Unsaved
Given reaction:
Identify which one of the following will cause the reaction to shift left.

Question 13 options:

A) Increasing the pressure

B) Increasing the volume

C) Adding H2

D) Decreasing the temperature

E) None of the above.
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Question 14 (0.34 points) Question 14 Unsaved
Identify the incorrect statement.
Question 14 options:

A) Solids are omitted from equilibrium expressions because the equilibrium concentrations are not affected by the amount of the solid as long as some solid is present.

B) An increase in temperature in an endothermic reaction will shift the reaction to the right (formation of more product)

C) An increase in volume of a system at equilibrium will cause the reaction to shift to the side of the reaction with the most gas molecules.

D) Equilibrium is the state when the rate of the forward reaction is equal to the rate of the reverse reaction.

E) A system that begins with only products will never reach equilibrium.
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Question 15 (0.34 points) Question 15 Unsaved
Consider the following reaction:
Kc = 8.90 × 10-7 at 650°C

If 0.650 mol of H2S is placed into a 750 mL flask, what is the equilibrium concentration of H2 at 650°C?

Question 15 options:

A) 5.5 × 10-3

B) 7.0 × 10-3

C) 6.2 × 10-4

D) 1.1 × 10-2

E) 1.4 × 10-2
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