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21 November, 18:15

What happens to the concentration of both components in the system as volume decreases? N2O4 (g) 2NO2 (g) both increase NO2 less; N2O4 greater NO2 greater; N2O4 less both decrease

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  1. 21 November, 18:35
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    According to Le Chatelier's principle when a system at equilibrium is subjected to changes in temperature, pressure, volume then the equilibrium will shift in a direction to counteract the induced change.

    The given equilibrium is:

    N2O4 (g) ↔ 2NO2 (g)

    Since Volume (V) is inversely related to the pressure (P), a decrease in V will cause an increase in P. Based on Le Chatelier's principle, the equilibrium will now shift to the direction of lower pressure i. e. towards the reactants (since the # moles of reactants is less than the products). As a result concentration of N2O4 will increase and that of NO2 will decrease.

    Ans: B

    NO2 less, N2O4 greater
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