Question

In: Chemistry

Select all of the correct statements about reaction quotients and equilibrium constants from the choices below....

Select all of the correct statements about reaction quotients and equilibrium constants from the choices below.

A reaction quotient equals the equilibrium constant at equilibrium.

K changes as temperature changes, but is independent of concentrations.

If Q = K the reaction is already at equilibrium.

A reaction quotient is the same as an equilibrium constant.

The richer a reaction mixture is in product the higher its Q value is.

As a reaction approaches equilibrium its Q value rises and its K value falls until they are equal.

Expert Solution

The correct options from the above statements are

consider the Equilibrium constant as "K" and Reaction Quotient as" Q"

a) A reaction quotient equals the equilibrium constant at equilibrium. True

therfore k=Q

b) K changes as temperature changes, but is independent of concentrations. True

Equilibrium constants K are not changed if we change the concentrations of things present in the equilibrium. The only thing that changes an equilibrium constant is a change of temperature

c) If Q = K the reaction is already at equilibrium. True

A comparison of Q with K indicates which way the reaction shifts and which side of the reaction is favored

If Q=K, then the reaction is already at equilibrium. There is no tendency to form more reactants or more products at this point. No side is favored and no shift occurs

[d) A reaction quotient is the same as an equilibrium constant FALSE

The main difference between K and Q is that K describes a reaction that is at equilibrium, whereas Q describes a reaction that is not at equilibrium]

e.The richer a reaction mixture is in product the higher its Q value is True

f. As a reaction approaches equilibrium its Q value rises and its K value falls until they are equal. True

ΔG = ΔGo + RT ln Q = -RT ln K + RT ln Q

At equilibrium, ΔG = 0 => Q = K

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