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An earthen pitcher used in summer cools ...

An earthen pitcher used in summer cools water in it essentially by evaporation of water from its porous surface. If a pitcher carries `4 kg` water and the rate of evaporation is `20 g` per hour, temperature of water in it decreases by `/_\T` in two hours. The value of `/_\T` is close to (ratio of latent of evaporation to specific heat of water is `540^(@)C`)

A

`2.7^(@)C`

B

`4.2^(@)C`

C

`5.4^(@)C`

D

`10.8^(@)C`

Text Solution

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The correct Answer is:
C
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