Question

Which statement about evaporation is incorrect?
a)Evaporation takes place at all temperature
b)Evaporation occurs only at the surface
c) Evaporation produces cooling
d) Average kinetic energy of residual liquid molecules increases as evaporation occurs​

Answer 1

c) Evaporation produces cooling

is incorrect about evaporation.

Answer 2

The statement about evaporation is that the average kinetic energy of residual liquid molecules increases as evaporation occurs. (OPTION D)

EVAPORATION -

• A vaporization process in which a liquid phase changes to the gaseous phase.
• It depends on the wind, humidity, and temperature difference between the surface and the air.
• It is a surface phenomenon that occurs when molecules from the water surface evaporate.
• Evaporation does not require liquid to be at its boiling point so, evaporation can occur at any temperature.
• Evaporation causes a cooling effect because the process requires heat energy.
• Evaporation takes away the heat energy from the surface leading to a cooling effect.
• When a liquid evaporates, the average kinetic energy of the molecules at the surface decreases because the molecules with the higher energy will evaporate.