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The toxic gas phosgene decomposes to a limited extent to carbon monoxide and chlorine at a certain temperature T K according to the following equation:COCl2(g)    ⇋  CO(g) + Cl2(g)The equilibrium constant, Kc, is 0.00081 at this temperature.What is the equilibrium constant for the reverse reaction?Give your answer with 2 significant figures in the exponential form, for example, 1.5e3 for 1500.

Question

The toxic gas phosgene decomposes to a limited extent to carbon monoxide and chlorine at a certain temperature T K according to the following equation:COCl2(g)    ⇋  CO(g) + Cl2(g)The equilibrium constant, Kc, is 0.00081 at this temperature.What is the equilibrium constant for the reverse reaction?Give your answer with 2 significant figures in the exponential form, for example, 1.5e3 for 1500.

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Solution

The equilibrium constant for the reverse reaction is the reciprocal of the equilibrium constant for the forward reaction.

Given that the equilibrium constant, Kc, for the forward reaction is 0.00081, the equilibrium constant for the reverse reaction, Kc', can be calculated as follows:

Kc' = 1 / Kc = 1 / 0.00081

To give the answer with 2 significant figures in the exponential form, we calculate the above and round to 2 significant figures.

Kc' = 1.23e3

This problem has been solved

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