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Degree of dissociation of X2Y = X2 + 1/2 Y2 (small x) in terms of Kp and pressure

The same question, asked 2 times: 23 Jan 2025, 29 Jan 2025. Every wording below, oldest first.

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  1. Question 1

    23 Jan 2025

    105
    Consider the reaction
    X2Y( g)⇌X2( g)+12Y2( g)X_{2}Y(\text{ }g) \rightleftharpoons X_{2}(\text{ }g) +\frac{1}{2}Y_{2}(\text{ }g)
    The equation representing correct relationship between the degree of dissociation ( x ) of X2Y(g)X_{2}Y(g) with its equilibrium constant Kp is _____\_\_\_\_\_ . Assume x to be very very small.

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  2. Question 2

    29 Jan 2025

    29
    At temperature T , compound AB2( g)AB_{2(\text{ }g)} dissociates as AB2( g)⇌AB(g)+12 B2( g)AB_{2(\text{ }g)}\rightleftharpoons AB_{(g)}+\frac{1}{2}{\text{ }B}_{2(\text{ }g)} having degree of dissociation x (small compared to unity). The correct expression for x in terms of KpK_{p} and p is

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