Problem: The reaction      2 NO2(g) ⇌ N2O4(g)is exothermic. This means that:A. Kc will not change if the temperature is increasedB. Kc will be negativeC. Kc will decrease as the temperature is increasedD. The forward reaction is more sensitive to temperature than the reverse reactionE. None of the above

FREE Expert Solution

We’re being asked to identify the correct statement for the given reaction:


2 NO2(g)  N2O4(g)          Exothermic


According to Le Chatelier’s Principle, if a system (chemical reaction) is at equilibrium and we disturb it, then the system will readjust to maintain its equilibrium state.



Since the reaction is exothermic, this means that ΔH = (–), heat is given off as a product:

2 NO2(g)  N2O4(g) + heat


The Kc expression for this reaction is:


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Problem Details

The reaction      2 NO2(g) ⇌ N2O4(g)
is exothermic. This means that:

A. Kc will not change if the temperature is increased

B. Kc will be negative

C. Kc will decrease as the temperature is increased

D. The forward reaction is more sensitive to temperature than the reverse reaction

E. None of the above

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Le Chatelier's Principle concept. You can view video lessons to learn Le Chatelier's Principle . Or if you need more Le Chatelier's Principle practice, you can also practice Le Chatelier's Principle practice problems.