During the process of evaporation, some molecules escape from a liquid, which affects the remaining liquid. Which row in the table correctly describes the location from which the molecules escape and the resulting change in the average kinetic energy of the remaining molecules?
Location of escaping moleculesAverage kinetic energy of remaining moleculesAonly from the surface of the liquiddecreasesBonly from the surface of the liquidincreasesCthroughout the entire liquiddecreasesDthroughout the entire liquidincreases \begin{array}{|c|l|l|} \hline & \textbf{Location of escaping molecules} & \textbf{Average kinetic energy of remaining molecules} \\ \hline \textbf{A} & \text{only from the surface of the liquid} & \text{decreases} \\ \hline \textbf{B} & \text{only from the surface of the liquid} & \text{increases} \\ \hline \textbf{C} & \text{throughout the entire liquid} & \text{decreases} \\ \hline \textbf{D} & \text{throughout the entire liquid} & \text{increases} \\ \hline \end{array} ABCDLocation of escaping moleculesonly from the surface of the liquidonly from the surface of the liquidthroughout the entire liquidthroughout the entire liquidAverage kinetic energy of remaining moleculesdecreasesincreasesdecreasesincreasesRow A
Row B
Row C
Row D
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.