A primitive air-conditioning unit for the use in places where electrical power is unavailable can be made by hanging up strips of linen soaked in water. the evaporation of the water cools the air. calculate the heat required to evaporate 5.00 l of water at 0c

Question

Schroeder

Physics

10 December, 14:50

A primitive air-conditioning unit for the use in places where electrical power is unavailable can be made by hanging up strips of linen soaked in water. the evaporation of the water cools the air. calculate the heat required to evaporate 5.00 l of water at 0c

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Answers (1)

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Scarlett Nielsen · Answer 1

Volume of water = 5 L

Because density of water is 1000 g/L, the mass of water is

m = (5 L) * (1000 g/L) = 5000 g

The latent heat of vaporization of water is 2257 J/g

Therefore the heat required is

Q = (5000 g) * (2257 J/g)

= 11.285 x 10⁶ J

= 11.85 MJ

Answer: 11.85 MJ