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

Question

Chemistry

Maximillian Fuentes

11 May, 10:31

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

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Answers (1)

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Lucian Lam · Answer 1

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).