A cup of hot coffee is left on a desk. Water gradually evaporates from the surface of the coffee.
How does this evaporation affect the temperature of the remaining cup of coffee, and how does it affect the average kinetic energy of the remaining water molecules?
Temperature of remaining coffee decreases; average kinetic energy of remaining molecules decreases
Temperature of remaining coffee decreases; average kinetic energy of remaining molecules increases
Temperature of remaining coffee increases; average kinetic energy of remaining molecules decreases
Temperature of remaining coffee increases; average kinetic energy of remaining molecules increases
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.