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Question

The equilibrium constant for the reaction :

Br2 2Br

at 500 K and 700 K are 1 × 1010 and 1 × 105 respectively. The reaction is:

A
endothermic
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B
exothermic
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C
fast
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D
slow
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Solution

The correct option is A endothermic
Br22Br

Kd=[Br]2[Br2]

(i) at 500KKd=1010

(ii) at 700KKd=105

As temperature increases Kd also increases

[Br] also increases

The reaction is endothermic as increasing temperature
leads to more products formed.

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