Question

Consider the following equilibrium between N2O4 and NO2.[Heat is added to a brown 2 NO2 gas to yield a colorless N2O4 gas]Which condition would cause the reaction to become darker brown?a.Low temperatureb. High pressurec. Small volumed. High temperature

Answer 1

Answer:

run the reaction at a higher temperature

Explanation:

Answer 2

Answer:

a.Low temperature

Explanation

Equation of reaction:

2NO2 <==> N2O4(g) ∆H = +ve

To cause the reaction to become darker brown means to produce more of NO2 gas. That is backward reaction.

Since the reaction is endothermic, decrease in temperature will shift the equilibrium position to the left thereby favouring backward reaction. This is in line with Me Chatelier's principle.

High pressure will rather favour forward reaction (it is not the right option).