During the process of evaporation, some molecules escape from a liquid. Which molecules are able to escape, and what is the resulting effect on the average kinetic energy of the remaining molecules?
Molecules escaping: those with the lowest kinetic energy; Average kinetic energy of remaining molecules: decreases
Molecules escaping: those with the lowest kinetic energy; Average kinetic energy of remaining molecules: increases
Molecules escaping: those with the highest kinetic energy; Average kinetic energy of remaining molecules: decreases
Molecules escaping: those with the highest kinetic energy; Average kinetic energy 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.