Distinguish between boiling and evaporation of liquid.

Monjur Alahi

Distinguish between boiling and evaporation of liquid.


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Salim Ahmed Kawsar

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Boiling of liquid Evaporation of liquid
i. Boiling of liquid takes place at boiling point which is fixed for a given pressure and unique for a given liquid. Evaporation of liquid can take place at any temperature.
ii. It occurs throughout the liquid. It occurs only at surface of liquid.
iii. The process does not depend on area of liquid surface exposed. The process depends upon area of liquid surface exposed. Higher the exposed surface area, higher the rate of evaporation.
iv. Source of energy is needed. Energy is taken from surrounding.
v. Boiling does not reduce temperature of liquid. When evaporation takes place, temperature of liquid decreases.
vi. During boiling process, bubbles are formed in liquid. During evaporation, no bubbles are formed in liquid.

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