During evaporation, some molecules escape from the surface of a liquid. Which statement correctly describes the effect on the remaining liquid?
The highest-energy molecules escape, so the average kinetic energy of the remaining molecules increases, increasing the liquid's temperature.
The highest-energy molecules escape, so the average kinetic energy of the remaining molecules decreases, decreasing the liquid's temperature.
The lowest-energy molecules escape, so the average kinetic energy of the remaining molecules increases, increasing the liquid's temperature.
The lowest-energy molecules escape, so the average kinetic energy of the remaining molecules decreases, decreasing the liquid's temperature.
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.