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Condensation of water vapor

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Natalie88112 | 19:45 Tue 09th Oct 2007 | Science
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If a 1-m cubed sample of air at sea-level pressure, containing 4 g of water vapor, is cooled and condensation occurs, how many calories of heat are released?
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Avatar Image Teddio
The latent heat of vaporisation of water is 2200000 Joules per kilogram.
For 4g (0.004kg) this will reduce to 8800 Joules.
4.2 Joules are equivalent to 1 Calorie so the energy released will be 2095 Calories.
20:00 Tue 09th Oct 2007

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