Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
Select ALL of the conditions that could be changed in a reaction at equilibrium without altering the value of Kc.
concentration
temperature
pressure
catalyst
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According to Le Châtelier's principle, if a reaction is endothermic and the temperature is decreased, what will happen to the equilibrium position?
it will move to the left
it will move to the right
it will stay the same
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What effect does increasing the temperature have on the equilibrium constant for an exothermic reaction?
it increases
it decreases
it stays the same
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What is the effect of a catalyst on the equilibrium constant and the position of equilibrium?
it decreases the equilibrium constant and moves the equilibrium to the left
it increases the equilibrium constant and moves the equilibrium to the right
it has no effect on the equilibrium constant or the position of equilibrium
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In an endothermic reaction, Kc when the temperature is increased.
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In an exothermic reaction, Kc when temperature is decreased.
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How does Kc change when the concentration of products in a reaction at equilibirum are increased?
Kc stays the same
Kc decreases
Kc increases
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The following reaction takes place at equilibrium:
A + B ⇌ C ΔrH = -10 kJ mol-1
Select ALL of the changes to conditions that could be made without altering the value of Kc.
increase the temperature
increase the concentration of A
decrease the temperature
add a catalyst
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What is the most likely value of Kc for a reaction that does not take place at all?
10-10
1
1010
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The following reaction takes place at equilibrium:
2A(g) + 3B(g) ⇌ 3C(g) + D(g) ΔHr = +50 kJ mol-1
Select ALL of the changes to conditions which would shift the position of equilibrium to the right.
decrease the pressure
increase the pressure
decrease the temperature
increase the temperature
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The following reaction takes place at equilibrium:
4A(g) + B(g) ⇌ 2C(g) + 3D(g) ΔrH = +70 kJ mol-1
Select the change to conditions which would shift the position of equilibrium to the left.
decrease the pressure
decrease the temperature
increase the pressure
increase the temperature
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The following reaction takes place at equilibrium:
2A(g) + B(g) ⇌ 2C(g) ΔrH = -20 kJ mol-1
Select ALL of the changes to conditions that would increase the value of Kp.
decrease the pressure
decrease the temperature
increase the pressure
increase the temperature
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The following reaction takes place at equilibrium:
H2(g) + I2(g) ⇌ 2HI(g) ΔrH = +51.9 kJ mol-1
Select ALL of the changes to conditions that could be made without altering the value of Kp.
increase the temperature
decrease the pressure
increase the pressure
decrease the temperature
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