Consider the effect of a volume change on this reaction at equilibrium.
Predict the effect (shift right, shift left, or no effect) of these changes.
(a) increasing the reaction volume
(b) decreasing the reaction volume
Here, we are going describe the the effect of a volume change on this reaction at equilibrium.
Le Châtelier’s principle states that when a chemical system at equilibrium is disturbed by changing the concentration, pressure or temperature, then the system shifts in a direction that minimizes the disturbance.
We know, that volume and pressure is inversely proportional to each other. Thus, if the
volume of a reaction mixture at chemical equilibrium is changed, the pressure changes and
the system shifts in a direction to minimize that change.
From ideal gas equation, PV =nRT
we know that decreasing the number of moles of a gas ( n ) results in a lower pressure ( P ).