During the formation of rain, when water vapour changes back to liquid in the form of rain drops:
A
heat is absorbed
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B
heat is released
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C
heat is first absorbed and then released
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D
there is no exchange of heat
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Solution
The correct option is A heat is released The energy contained in the gaseous form (vapour) is more than the energy
contained in the liquid form (water). Therefore when vapour changes to
water it loses some heat.