A-LevelPhysicsThermodynamics9702/12 · May/June 2011 · Q221 Mark
The table summarises some descriptions of evaporation. Which row of 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
✓ Correct answer
B: involves 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
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