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Le Chatelier's Principle for Del N Lesser Than Zero

What percenta...

Question

What percentage of $C O_{2}$ in air is just sufficient to prevent in weight when $C a C O_{3}$ is heated at $100^{\circ} C$ ?( $K_{p}$ for $C a C O_{3} (s) \Leftrightarrow C a O (s) + C O_{2} (g)$ is $0.0095$ atm at $100^{\circ} C$ )

greater than 0.95%

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greater than 0.29%

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greater than 0.71%

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greater than 0.05%

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Solution

The correct option is A greater than 0.95%
The dissociation equilibrium is $C a C O_{3} (s) \Leftrightarrow C a O (s) + C O_{2} (g)$ .
The expression for the equilibrium constant is $K_{P} = P_{C O_{2}} = 0.0095 a t m$ .
When the percentage of carbon dioxide in air is greater than $0.0095 \times 100 = 0.95$ %, the loss in weight of carbon dioxide will be prevented.

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