Explanation

• In a sample of a substance, the particles (atoms or molecules) have a distribution of energies at any given temperature. This is known as the Maxwell-Boltzmann distribution.
• According to this distribution, some particles have high energies, while others have low energies, but the average energy of the particles is constant at a given temperature.
• The energy of individual particles in a sample is not the same, as they are in constant motion and colliding with each other, leading to a range of energies.
• This is why the concept of average energy or kinetic energy is used to describe the energy of a sample as a whole.