Question

When a substance is heated,the kinetic energy of particles decreases?

• A. True
• B. False

Answer 1

The correct option is B False

Understanding the concept:

As heat causes molecules to move faster (heat energy is transformed into kinetic energy), the volume of a gas increases.

Explanation of kinetic energy of gaseous molecules:

• With the supply of heat, the kinetic energy increases, and they start moving more vigorously.
• The average energy or kinetic energy of an object's particles increases as its temperature rises.
• The object's heat energy rises as the average kinetic speed of its particles increases.
• As an object's temperature rises, so does its thermal energy.

Thus when a substance is heated, the kinetic energy of particles decreases is an incorrect option.