Question

When heat is applied, energy is absorbed and the particles start vibrating more vigorously
(A) True
(B) False

Answer 1

Hint: When heat is applied to a body it can cause various changes in the shape, the temperature of that particular body, chemical change, etc. It causes a change in the frequency of vibrations of the body due to the increased kinetic energy of the particles.

Complete step by step answer:
When heat is applied to a body the following phenomenon takes place.
1.Expansion
2.Increase in temperature
3.Change of state
4.Chemical change

Expansion- When heat is supplied to a solid body the particles gain energy and start vibrating more vigorously about their fixed positions. A solid body consists of low kinetic energy particles fixed into their respective positions by interparticle forces.
Due to vigorous vibration, it sets the particles apart leading to expansion.
For a certain change in temperature expansion in the liquid is more than that of solid and there is an enormous expansion in gases in a confined volume

Increase in temperature: When heat is applied to a body then the kinetic energy of the particles increases which means the particle moves at higher speeds. Since temperature is a function of average kinetic energy therefore the temperature increases.

Change of state: When heat is applied to a body, the temperature doesn’t change while changing the state. The heat is absorbed and is used to separate the particles. The heat absorbed is used in changing the state of the body is called latent heat.So on applying heat to a body the particles start vibrating more vigorously.


Therefore it is a true statement.

Note: The particles on heating acquire the energy which is used to increase the vibrations as they absorb the energy, the temperature is increased and the particles start vibrating
vigorously. An increase in vibrations about their fixed positions is attributed to the increased kinetic energy due to the energy gained