$(a)$ "Evaporation causes cooling." Explain the reason for this effect.
$(b)$ Explain two examples from our daily life where we feel the effect of cooling due to evaporation.
$(b)$ Explain two examples from our daily life where we feel the effect of cooling due to evaporation.
(N/A) During the process of evaporation, the particles of the liquid absorb energy from the surroundings to overcome the force of attraction and change into the vapor state. This absorption of energy from the surroundings makes the surroundings lose heat, thereby causing a cooling effect.
$(b)$ Two examples from daily life are:
$1.$ Wearing cotton clothes in summer: Cotton is a good absorber of water, which helps in absorbing sweat from our body and exposing it to the atmosphere for easy evaporation. The latent heat of vaporization required for this evaporation is taken from our body surface, making us feel cool.
$2.$ Cooling by desert coolers: The water inside the cooler evaporates, which absorbs heat from the surrounding air, resulting in a decrease in the temperature of the air blown into the room.
$(b)$ Two examples from daily life are:
$1.$ Wearing cotton clothes in summer: Cotton is a good absorber of water, which helps in absorbing sweat from our body and exposing it to the atmosphere for easy evaporation. The latent heat of vaporization required for this evaporation is taken from our body surface, making us feel cool.
$2.$ Cooling by desert coolers: The water inside the cooler evaporates, which absorbs heat from the surrounding air, resulting in a decrease in the temperature of the air blown into the room.
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