Physics 5054 · O Level · States of matter

States of matter — practice question

Which statement about water is true?

  • AAt the boiling point, water vapour molecules have the same kinetic energy as liquid water molecules.
  • BEvaporation occurs only at the boiling point.
  • CWater molecules become heavier when water freezes.
  • DWater molecules lose all of their kinetic energy when water freezes.

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