Question

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.

Answer 1

Answer: Option (B) is the correct answer.

Step-by-step 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
`K_(eq)` is the equilibrium constant and it is also equal to the concentration of products divided by the concentration of reactants. Also,
`K_(eq)` is measured at equilibrium condition.

But at equilibrium, Q =
`K_(eq)`

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.