(a(i))[2]
Explain, in terms of particle motion, why this drop in temperature happens.
(a(ii))[1]
Explain why energy is needed for the water to evaporate.
(b)[2]
State two ways evaporation is unlike boiling.
Physics 5054 · O Level · Melting, boiling and evaporation
Melting, boiling and evaporation — practice question
Fig. 5.1 shows a device that lowers the temperature of room air by evaporation.
Water runs from the container into the sponge block, so it stays damp.
Air enters through one grille and leaves through the other.
When the air passes through the damp sponge block, the water in the sponge block evaporates.