In which of the following equilibrium systems | vedclass

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(A) According to Le Chatelier's principle,an increase in pressure shifts the equilibrium towards the side with a smaller number of gaseous moles. Conv

Vedclass · Accepted Answer

$PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$

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(A) According to Le Chatelier's principle,an increase in pressure shifts the equilibrium towards the side with a smaller number of gaseous moles. Conversely,the backward reaction is favoured by an increase in pressure if the number of gaseous moles of products is greater than the number of gaseous moles of reactants (i.e.,$\Delta n_g > 0$). For option $A$: $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$,$\Delta n_g = (1+1) - 1 = 1 > 0$. Since the product side has more moles,increasing the pressure will shift the equilibrium to the left (backward reaction).

In which of the following equilibrium systems is the rate of the backward reaction favoured by an increase of pressure?

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