When vapour condenses into liquid:

It absorbs heat.

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It releases heat.

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It can either release or absorb heat.

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No heat exchange occurs.

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Solution

The correct option is B
It releases heat.

Energy is released when there is a phase change from liquid to solid (fusion) ot a gas to liquid (condensation). So, vapour to the liquid phase transition releases heat.

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Similar questions

When water at $0^{\circ}$ C freezes to form ice at the same temperature of $0^{\circ}$ C, then it :

(a) absorbs some heat (b) releases some heat

Why is heat given out when a vapour condenses into a liquid ?

When 1 g of ice at 0°C melts to form 1 g of water at 0°C, the ice

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