For the equilibrium reaction 2NO rightlefthar | vedclass

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Question

(B) The given reaction is $2NO \rightleftharpoons N_2 + O_2 + x \, cal$. Since the reaction releases heat $(x \, cal)$,it is an exothermic reaction. A

Vedclass · Accepted Answer

Low temperature

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(B) The given reaction is $2NO \rightleftharpoons N_2 + O_2 + x \, cal$. Since the reaction releases heat $(x \, cal)$,it is an exothermic reaction. According to Le Chatelier's principle,for an exothermic reaction,a decrease in temperature favors the forward reaction. However,the question asks for the dissociation of $NO$. Since the number of moles of gaseous reactants ($2$ moles) is equal to the number of moles of gaseous products ($1+1=2$ moles),pressure has no effect on the equilibrium. Therefore,to favor the forward reaction (dissociation of $NO$),a low temperature is required.

For the equilibrium reaction $2NO \rightleftharpoons N_2 + O_2 + x \, cal$,which condition is suitable for the greater dissociation of $NO$?

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