Which row explains how increasing the temperature of a liquid and increasing its surface area speed up the rate of evaporation?
| Increasing the temperature | Increasing the surface area | |
|---|---|---|
| A | Increases the average kinetic energy of the molecules | Increases the total number of molecules present in the liquid |
| B | Increases the average kinetic energy of the molecules | Increases the number of molecules close to the surface of the liquid |
| C | Increases the attractive forces between the molecules | Increases the total number of molecules present in the liquid |
| D | Increases the attractive forces between the molecules | Increases the number of molecules close to the surface of the liquid |
A
B
C
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.