Interconversion Of Matter

SOME EXAMPLES OF COOLING CAUSED BY EVAPORATION FROM DAILY LIFE
    
(i) Pouring of Acetone on palm : We feel cool when we pour some acetone on our palm. This is because, the energy needed for evaporation is taken from the palm which, in turn, feels cooling.

(ii) Sprinkling water on roof or open ground in summer: We often sprinkle water on the roof of the house or open ground on a hot sunny day. The reason being that the large heat of vaporization of water helps to cool the hot surface.

(iii) Wearing cotton clothes in summer: During summer, we sweat or perspire a lot. The cotton, being a good absorber of water, absorbs the sweat and exposes it to the atmosphere for easy evaporation. Consequently our body feels cool (because evaporation causes cooling). Thus, we wear cotton clothes in summer.

(iv) Water droplets are seen on the outer surface of a glass tumbler containing ice cold water: This is due to the reason that, water vapours present in air, on coming in contact with the cold surface of the glass, lose energy and get condensed or get converted into the liquid state which are see as water droplets. 

DIFFERENCE BETWEEN BOILING AND EVAPORATION