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Characteristics of Equilibrium Constant

Dimensions of...

Question

Dimensions of equilibrium constant, $K_{c}$ for the reaction $2 N H_{3} ⇌ N_{2} + 3 H_{2}$ , are ___.

m o l L^{- 2}

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m o l^{2} L^{- 2}

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m o l^{2} L^{- 3}

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m o l^{2} L^{- 1}

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Solution

The correct option is B $m o l^{2} L^{- 2}$ .
Dimension of $K_{c}$ is $(m o l L^{- 1})^{Δ n}$

For the given reaction, $Δ n = 4 - 2 = 2$

Hence, dimension of $K_{c} = (m o l L^{- 1})^{2} = m o l^{2} L^{- 2}$

Hence, the statement is correct

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1000 K

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The equilibrium constant $K_{c}$ for the reaction $N_{2}$ (g) + 3 $H_{2}$ (g) $⇋$ 2 $N H_{3}$ (g) is:

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