During the process of evaporation, some molecules escape from the surface of a liquid, causing its temperature to change.
Which row correctly describes the average kinetic energy of the escaping molecules compared to the average of the liquid, and the resulting effect on the temperature of the remaining liquid?
| Average kinetic energy of escaping molecules | Temperature of the remaining liquid | |
|---|---|---|
| A | Lower than average | Increases |
| B | Lower than average | Decreases |
| C | Higher than average | Decreases |
| D | Higher than average | Increases |
Row A
Row B
Row C
Row D
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.