In a reaction at equilibrium involving only gases,a change in pressure of the reaction mixture shifts the position of equilibrium only when:
A)heat is absorbed by the reaction proceeding to the right
B)the gases are impure
C)the collision rate increases
D)the reaction is exothermic as written
E)the moles of gas are not equal on the two sides of the equation

Question

Quizplus · Accepted Answer

According to Le Chatelier's principle, a change in pressure will shift the equilibrium position towards the side of the reaction with fewer moles of gas. Therefore, if the moles of gas are not equal on both sides of the equation, a change in pressure will shift the equilibrium position. None of the other options given are directly related to the effect of a change in pressure on the equilibrium position.

In a Reaction at Equilibrium Involving Only Gases,a Change in Pressure