On a hot humid morning, water droplets appear on the outer surface of a glass containing ice-cold water.…

On a hot humid morning, water droplets appear on the outer surface of a glass containing ice-cold water. Where did this water come from?
  1. Water seeped through the glass walls
  2. Atmospheric water vapor condensed upon hitting the cold glass surface
  3. Ice inside converted directly into gas and leaked out
  4. Glass reacted chemically with surrounding air

Solution

Water vapor present in the warm surrounding air loses heat energy upon contacting the cold glass surface and condenses into liquid water.

Asked in: Homi Bhabha Practice

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