Question

11. ______ is a surface phenomenon, whereas boiling is a _____.

• A. Evaporation
• B. Bulk phenomenon

Answer 1

Evaporation is a process when water converts from a liquid state to a vapor state at a temperature below its normal boilng point

• Evaporation is a surface phenomenon because the molecules with the highest kinetic energy disperse into the air from the liquid's uppermost layer, making it a surface phenomenon.

Boiling point is the temperature at which liquid converts into the gaseous state is known as the boiling point.

• Bulk phenomena refers to a process that involves whole molecules, including both inside and surface molecules.
• Boiling is a bulk phenomenon because it causes the particles in a liquid's bulk to gain energy and subsequently change to a gaseous or vapour form.

Hence, Evaporation is a surface phenomenon, whereas boiling is a bulk phenomenon.