PDF chapter test TRY NOW
Give brief answers to the following questions:
Comment on the following statements:
(a). Evaporation produces cooling.
(b). Rate of evaporation of an aqueous solution decreases with increase in humidity.
(c). Sponge though compressible is a solid.
(a). Evaporation produces cooling.
(b). Rate of evaporation of an aqueous solution decreases with increase in humidity.
(c). Sponge though compressible is a solid.
(a). produces cooling as the particles at the surface of the liquid gain energy from the surroundings and change into vapour, thereby producing a cooling effect.
(b). around us cannot hold more than a definite amount of water vapour at a given temperature known as . So, if the air is already rich in water vapour, it will not take up more water; therefore, the water evaporation rate will .
(c). A sponge has minute holes in which is trapped. Also, the material is not rigid. When we press it, the air is expelled out, and we can compress it.
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