Which of the following states is true? (a) q does not change with temperature. (b) q is the same as keq when a reaction is at equilibrium. (c) key does not change with temperature, whereas q is temperature dependent. (d) k does not depend on the concentration or partial pressures of reaction components. (e) q does not depend on the concentrations or partial pressures of reaction components.

Option (B) is the correct answer.

Explanation:

Q is defined as the reaction quotient which is equal to the concentration of products divided by the concentration of reactants.

Q can be measured at any condition of the reaction.

Whereas is the equilibrium constant and it is also equal to the concentration of products divided by the concentration of reactants. Also, is measured at equilibrium condition.

But at equilibrium, Q =

Also, there is no relation between Q and temperature.

Thus, we can conclude that the statement Q is the same as Keq when a reaction is at equilibrium, is true.

100c is waters boiling point