Solids, liquids and gases expand on heating.

Solids expand on heating because

The point where water in a solid, liquid and gas states co-exists in equilibrium at unique temperature and pressure is known as _______

Diagram based question: Write the answers to the questions by observing the figure Write two examples each of the solid, liquid and gaseous fuels produced in this fuel production process?

Substances change their state from solid to liquid or liquid to gas on heating up to specific temperature.

Liquids and gases except mercury are

Diffusion, is movement of ions, atoms or molecules of solutes, liquids or gases from their region of ________ concentration to a region of their lower _______ till equilibrium is attained.

Distinguish between : Volumetric expansion of liquids and volumetric expansion of gases .