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EVAPORATION Printed From: One Stop GATE Category: GATE Previous Years Test Papers - Discuss Here Forum Name: ME Papers Forum Discription: ME Previous Year GATE Papers to can discussed here. URL: http://forum.onestopgate.com/forum_posts.asp?TID=424 Printed Date: 28Feb2025 at 8:07pm Topic: EVAPORATION Posted By: manju Subject: EVAPORATION Date Posted: 22Feb2007 at 10:18am  Consider a drop of water on a table. U cant find it after some time. Because it evaporates. But for water to evaporate at a pressure of 1 bar its temperature should increase to 100 degree centigrade. Then why did the water evaporate Replies: Posted By: balu Date Posted: 22Feb2007 at 10:20am  Evaporation is a surface effect. The temperature of a body of water represents an AVERAGE value of the kinetic energy of the water molecules in the water. Some of those molecules have a "higher than average" kinetic energy and break free of the surface to become water vapor. As this happens over time, the remaining body of water becomes slightly cooler (as water molecules with higher kinetic energy have "left"). That is why sweat evaporating from your body provides a mechanism to cool you off.

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