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1)surrounding air become warm when vapour phase of water condenses.

2)vapour phase of water are the slower moving molecules in the air.

3)removal(condensation) of slower moving molecules from the surroundings increases the average kinetic energy of the remaining molecules

4) hence, the warming.

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A. Condensation is a warming process. The process of phase change of vapour to liquid is condensation. When vapour touches a cool object the molecules in vapour lose kinetic energy. As a result the temperature of water molecules decreases and condenses on the surface of the cool object. This is an exothermic reaction. So the average kinetic energy of the molecules in vapour increases. Thus the surround

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