Physics 0625 · IGCSE · Kinetic particle model of matter

Kinetic particle model of matter — practice question

A test tube holds $1.0\,\text{cm}^3$ of liquid water at $100^\circ\text{C}$. The liquid water changes into $1600\,\text{cm}^3$ of steam. What causes the large rise in volume?

  • ASteam molecules are bigger than water molecules.
  • BThe average distance between the molecules is much greater in the steam.
  • CThe molecules do not move until the water turns into a gas.
  • DThere are more steam molecules than there were water molecules.

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