
Interpretation:
The change that shifts the equilibriumto the right in the given reaction have to be explained.
Concept Introduction:
Le Chatelier's principle: Le Chatelier's principle states that when an equilibrium is subjected to a stress, the equilibrium shifts in such a way as to reduce the stress. Therefore, when a system at equilibrium is subjected to a change in concentration, temperature and pressure, the equilibrium shifts in the direction to reduce the change.

Answer to Problem 69A
Addition of nitrogen gas at constant volume and temperature.
When nitrogen gas is added to the system, according to the Le Chatelier’s principle theequilibriumwill shift in the direction that consumesnitrogen gas to keep the equilibrium constant. Therefore, according to the Le Chatelier’s principle adding nitrogen gas will shift the equilibrium to the right side.
Explanation of Solution
When a system at equilibrium is subjected to a change in concentration, temperature and pressure, the equilibrium shifts in the direction to reduce the change. When nitrogen gas is added to the system, according to the Le Chatelier’s principle theequilibrium will shift in the direction that consumesnitrogen gas to keep the equilibrium constant.Therefore, according to the Le Chatelier’s principle adding nitrogen gas will shift the equilibrium to the right side.
Chapter 17 Solutions
World of Chemistry, 3rd edition
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