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Enthalpy

If enthalpy o...

Question

If enthalpy of atomisation for $B r_{2} (l)$ is x $k J / m o l$ and bond enthalpy for $B r_{2}$ is y $k J / m o l$ , the relation between them:

is x > y

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is x<y

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is x = y

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does not exist

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Solution

The correct option is A is x > y

$△ H_{atomisation} = △ H_{v a p} + y x - y = △ H_{v a p}$

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