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Activation Energy

For the gaseo...

Question

For the gaseous phase reaction,
$2 N O ⇌ N_{2} + O_{2}; Δ H^{0} = - 43.5 k c a l . {m o l}^{- 1}$
Which statement is correct?

A

K

varies with addition of

N O

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B

K

decreases as temperature decreases

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C

K

increases as temperature decreases

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D

K

is independent of temperature

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Solution

The correct option is C $K$ increases as temperature decreases
For the reaction in gas phase :
$2 N O ⇋ N_{2} + O_{2}$ $; Δ H = - 43.5$ $k c a l . m o l^{- 1}$
Here, on decreasing the temperature the value of $K$ will increase since the reaction is exothermic. $K$ is dependent on temperature and is independent of the concentration of reactants or products.

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