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2.2 Thermal properties and temperature

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Question 88

During evaporation, molecules escape from the surface of a liquid, which affects the remaining liquid's temperature.

Which row in the table correctly describes the energy of the escaping molecules and the resulting change in the temperature of the remaining liquid?

Escaping moleculesTemperature of the remaining liquidALower kinetic energyDecreasesBLower kinetic energyIncreasesCHigher kinetic energyDecreasesDHigher kinetic energyIncreases \begin{array}{|c|l|l|} \hline & \text{Escaping molecules} & \text{Temperature of the remaining liquid} \\ \hline \text{A} & \text{Lower kinetic energy} & \text{Decreases} \\ \hline \text{B} & \text{Lower kinetic energy} & \text{Increases} \\ \hline \text{C} & \text{Higher kinetic energy} & \text{Decreases} \\ \hline \text{D} & \text{Higher kinetic energy} & \text{Increases} \\ \hline \end{array} ABCD​Escaping moleculesLower kinetic energyLower kinetic energyHigher kinetic energyHigher kinetic energy​Temperature of the remaining liquidDecreasesIncreasesDecreasesIncreases​​
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and 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.

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