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BOILING WATER UNDER DIFFERENT CONDITIONS<br />
Flask on Hot Plate Compared to Evacuated Flask<br />
At atmospheric pressure water must be heated to reach a boil. When pressure is brought below equilibrium vapor pressure by a cold water aspirator,  normal evaporation becomes a boil without heat.

Fphoto-60650503A-6RM.jpg

BOILING WATER UNDER DIFFERENT CONDITIONS
Flask on Hot Plate Compared to Evacuated Flask
At atmospheric pressure water must be heated to reach a boil. When pressure is brought below equilibrium vapor pressure by a cold water aspirator, normal evaporation becomes a boil without heat.

Copyright:© 2005 Richard Megna - Fundamental Photographs

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