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प्रश्न
Why does our palm feel cold when we put some acetone (or perfume) on it ?
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उत्तर
Our palm feels cool when we put acetone over it because acetone takes up the latent heat of vaporisation to change into vapour from our palm.
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संबंधित प्रश्न
Why does a desert cooler cool better on a hot dry day?
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
What is evaporation?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Give two applications of evaporation.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.
Which produces more severe burns : boiling water or steam ? Why ?
How can the evaporation of a liquid be made faster ?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
Comment on the following statements:
Evaporation produces cooling.
