AnswersMO-Physical Science A-CRShifts in Equilibrium

Shifts in Equilibrium Answers

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Consider the chemical equation in equilibrium. CH4(g) + H2O(g) CO(g) + 3H2(g) What will happen to the equilibrium of this reaction if the pressure is increased?

Question illustration
A
The equilibrium will shift to the left to favor the reverse reaction.
B
The equilibrium will shift to the right to favor the forward reaction.
C
The equilibrium will not be affected by changing the pressure.
D
The equilibrium will not be reestablished after this kind of stress.
3

Consider the chemical reaction in equilibrium. aA(aq) + bB(aq) cC(aq) + dD(aq) According to Le Chatelier’s principle, which statement correctly completes the table below? Change Effect on equilibrium constant (K) Increase in concentration of products Value of K does not change Increase in temperature Value of K also changes Increase in pressure ?

Question illustration
A
value of K does not change
B
value of K increases
C
value of K decreases
D
value of K oscillates
4

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5

According to Le Chatelier’s principle, which statement is true?

A
The equilibrium constant is unchanged by temperature changes.
B
The equilibrium constant changes with a change in temperature.
C
The equilibrium constant increases with the concentration of reactants.
D
The equilibrium constant decreases with the concentration of products.
6

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7

Consider the reaction H2(g) + I2(g) HI(g) with an equilibrium constant of 46.3 and a reaction quotient of 525. Which direction will the system shift to?

Question illustration
A
The equilibrium will shift to the left to favor the reactants.
B
The equilibrium will shift to the right to favor the products.
C
The equilibrium will not shift in any direction.
D
The equilibrium will shift to the forward reaction.
8

Consider the reaction in chemical equilibrium. COCl2(g) CO(g) + Cl2(g) Which is the correct equation for K?

Question illustration
A
Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction
Option A
B
Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction
Option B
C
Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket EndFraction
Option C
D
Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 EndFraction
Option D
9

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10

According to Le Chatelier’s principle, what always happens to the equilibrium of a reaction when the temperature is reduced?

A
It shifts to the right.
B
It shifts to the left.
C
It shifts in the exothermic direction.
D
It shifts in the endothermic direction.

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