Question

which direction does this reaction shift when no gas is removed from the equilibrium system?
2no(g) + o₂(g) ⇌ 2no₂(g) + 114 kj
the reaction shifts right or to products.
the reaction shifts left or to reactants.
the reaction does not shift.

Explanation:

Step1: Recall Le Chatelier's Principle

Le Chatelier's Principle states that if a stress is applied to a system at equilibrium, the system will shift in a direction to counteract that stress. Here, the stress is the removal of \( \text{NO}(g) \), a reactant.

Step2: Determine the Shift Direction

When a reactant (NO) is removed, the system will try to produce more of that reactant to counteract the removal. To produce more NO, the reaction will shift in the reverse direction (towards the reactants), which is the left side of the equilibrium \( 2\text{NO}(g) + \text{O}_2(g)
ightleftharpoons 2\text{NO}_2(g) + 114\ \text{kJ} \).

Answer:

The reaction shifts left or to reactants.