During evaporation, the most energetic molecules escape from the surface of a liquid into the gas phase.
Which row in the table correctly describes both the change in the temperature of the remaining liquid and the change in the average kinetic energy of the remaining molecules?
Temperature of remaining liquidAverage kinetic energy of remaining moleculesAdecreasesdecreasesBdecreasesremains constantCremains constantdecreasesDremains constantremains constant \begin{array}{|c|c|c|} \hline & \text{Temperature of remaining liquid} & \text{Average kinetic energy of remaining molecules} \\ \hline \text{A} & \text{decreases} & \text{decreases} \\ \hline \text{B} & \text{decreases} & \text{remains constant} \\ \hline \text{C} & \text{remains constant} & \text{decreases} \\ \hline \text{D} & \text{remains constant} & \text{remains constant} \\ \hline \end{array} ABCDTemperature of remaining liquiddecreasesdecreasesremains constantremains constantAverage kinetic energy of remaining moleculesdecreasesremains constantdecreasesremains constantdecreases / decreases
decreases / remains constant
remains constant / decreases
remains constant / remains constant
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.