During a warm day, an athlete cools down as sweat (which is mostly water) evaporates from their skin.
Which molecules are most likely to escape from the liquid sweat, and what happens to the average speed of the water molecules that remain on the skin?
Escaping molecules: the more energetic ones; average speed of remaining molecules: decreases
Escaping molecules: the more energetic ones; average speed of remaining molecules: increases
Escaping molecules: the less energetic ones; average speed of remaining molecules: decreases
Escaping molecules: the less energetic ones; average speed of remaining molecules: increases
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.