The dissociation of phosgene is represented as follows:
` COCl_2 (g) hArr CO(g) +Cl_2( g) `
When a mixture of these three gasses at equilibrium is compressed at constant temperature , what happens to
the equilibrium constant for the reactions?

Explanation

To solve the question regarding the dissociation of phosgene and the effect of compressing the gas mixture at constant temperature on the equilibrium constant, we can follow these steps:

### Step 1: Write the Reaction
The dissociation of phosgene can be represented as:
\[ \text{COCl}_2 (g) \rightleftharpoons \text{CO} (g) + \text{Cl}_2 (g) \]

### Step 2: Understand the Equilibrium Constant
The equilibrium constant \( K_c \) for the reaction at a given temperature is defined as:
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