Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

The table gives a summary of several descriptions of evaporation. Which row in the table is correct?

  • Ainvolves a change in state from liquid to vapour: true; occurs at a fixed temperature: true; involves a reduction in the average kinetic energy of the remaining atoms: true
  • Binvolves a change in state from liquid to vapour: true; occurs at a fixed temperature: false; involves a reduction in the average kinetic energy of the remaining atoms: true
  • Cinvolves a change in state from liquid to vapour: true; occurs at a fixed temperature: false; involves a reduction in the average kinetic energy of the remaining atoms: false
  • Dinvolves a change in state from liquid to vapour: false; occurs at a fixed temperature: true; involves a reduction in the average kinetic energy of the remaining atoms: false

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