Question

when a solid is heated we get liquid when a liquid is heated we get gas then when a gas is heated​

Answer 1

Answer:

Explanation:

Heating a gas transfers energy to the gas particles causing them to move more rapidly. What happens next depends on whether the gas is contained or not.

If the gas is not contained (or contained in an expandable container) then the particles will use their increased energy to begin moving farther apart, in other words expanding the volume of the gas.

If the gas is in a container that cannot expand, then the energized gas particles will be colliding with the walls of the container more frequently and more forcefully, this will be measurable as an increase in the pressure of the gas.

So, gases expand when heated unless prevented from doing so by the walls of a container in which case the gas pressure will increase instead.