For the gas phase reaction 2 NO + , H = – 43.5 Kcal mol–1which one of the statement below is true for (g) + (g) 2 NO (g)

Question

For the gas phase reaction 2 NO $N_2$ + $O_2$, H = – 43.5 Kcal mol–1which one of the statement below is true for $N_2$ (g) + $O_2$ (g) 2 NO (g)

Prashant Kotian · Accepted Answer

Correct answer: C. As the enthalpy of the given reaction is negative, so, the enthalpy of its reverse reaction is positive, hence, it is an endothermic reaction. So, according to the Le-Chatelier’s principle, when the temperature decreases, the reaction is directed in backwards direction for an endothermic reaction. Due to which K of the reaction decreases. Therefore, option (c) is the correct answer.

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