If the volume of an equilibrium mixture of N2(g), H2(g) and...

If the volume of an equilibrium mixture of $\mathrm{N}_{2}(\mathrm{g}), \mathrm{H}_{2}(\mathrm{g})$ and $\mathrm{NH}_{3}(\mathrm{g})$ is reduced by doubling the pressure, will $P_{\mathrm{N}_{2}}$ have increased, decreased, or remained the same when equilibrium is re established? Explain. $$ \mathrm{N}_{2}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{g}) $$

If the volume of an equilibrium mixture of $\mathrm{N}_{2}(\mathrm{g}), \mathrm{H}_{2}(\mathrm{g})$ and $\mathrm{NH}_{3}(\mathrm{g})$ is reduced by doubling the pressure, will $P_{\mathrm{N}_{2}}$ have increased, decreased, or remained the same when equilibrium is re established? Explain.
$$
\mathrm{N}_{2}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{g})
$$

Key Concepts

Chemical Equilibrium

Chemical equilibrium refers to the state in a reversible reaction where the forward and reverse reactions occur at equal rates, resulting in constant concentrations of reactants and products over time. At equilibrium, the system is balanced, and any disturbances can lead to shifts in the position of equilibrium to reestablish balance.

Le Chatelier's Principle

Le Chatelier's principle is a guideline that predicts how a system at equilibrium responds to disturbances such as changes in concentration, temperature, or pressure. It states that if an external change is imposed on a system at equilibrium, the system will adjust its position to counteract the imposed change and restore equilibrium.

Pressure Effects on Gaseous Equilibria

When the pressure is changed in a gaseous equilibrium system, the position of equilibrium shifts in favor of the side with fewer moles of gas. This is because a reduction in volume (or an increase in pressure) causes the system to shift toward the side that occupies less space, thereby reducing the pressure. This concept is crucial for predicting how partial pressures of individual gases, such as N2, will adjust when the system is perturbed.

Reaction Stoichiometry

Reaction stoichiometry involves the quantitative relationships between reactants and products in a chemical reaction. In the context of gaseous reactions, the stoichiometry determines the number of gas moles on each side of the equilibrium. This information is used to predict how changes in pressure will influence the equilibrium concentrations or partial pressures of the gaseous species involved.

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