Question

b) describe what happens to the spaces between the particles and the forces between the particles as a substance changes from a solid to a liquid to a gas. (2 marks) increasing energy

Explanation:

When a substance changes from solid to liquid to gas, the spaces between particles increase as energy is added. In a solid, particles are closely - packed with strong forces between them. As heat (energy) is added to become a liquid, particles gain enough energy to move more freely, increasing the spaces and weakening the forces. When changing to a gas, particles have even more energy, move independently, and the spaces are much larger with very weak forces between them.

Answer:

As a substance changes from solid to liquid to gas, the spaces between the particles increase and the forces between the particles decrease.