Question

What are a kind of effect of heat on matter on physical change

Answer 1

When heat is added to a solid, the particles gain energy and vibrate more vigorously about their fixed positions, forcing each other further apart. As a result expansion takes place. Similarly, the particles in a liquid or gas gain energy and are forced further apart. The degree of expansion depends on the substance.

Answer 2

Heat is a form of energy that is neither created nor destroyed. It can only be transferred from one matter to another.

Explanation:

Heat is the result of motion of particles in any matter.

Effect of heat on the physical change of matter:

Change in temperature: Heat raises the temperature of matter.

• When heat is applied to any material, the particles absorb the heat energy and that energy is converted into kinetic energy of particles and this increased kinetic energy comes out as increased temperature of material.
• The absorbed heat energy increases the internal energy of material which increases the temperature of matter.

Change in volume: Heat increases volume of matter

• After heat is applied, particles in material get excited and starts vibrating at a faster pace. This results in increased volume of the material.

Change in state of matter: Heat changes phase of matter

• Heat raises the temperature and causes melting or evaporation of matter.
• A solid melts and changes its phase into liquid matter.
• Liquid matter evaporates and changes its states into gaseous matter.