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A pitcher with 1 -mm thick porous walls contains 10 kg of water. Water comes to its outer surface and evaporates at the rate of 0.1gs−1. The surface are aof the pitcher (one side) = 200 cm2. The room temperature = 42∘, latent heat of vaporization = 2.27×106Jkg−1, and the thermal conductivity of the porous walls = 0.80Js−1m−1∘C−1. Calculate the temperature of water in the pitcher when it attains a constant value. |
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Answer» A pitcher with 1 -mm thick porous walls contains 10 kg of water. Water comes to its outer surface and evaporates at the rate of 0.1gs−1. The surface are aof the pitcher (one side) = 200 cm2. The room temperature = 42∘, latent heat of vaporization = 2.27×106Jkg−1, and the thermal conductivity of the porous walls = 0.80Js−1m−1∘C−1. Calculate the temperature of water in the pitcher when it attains a constant value. |
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