Question

Why temperature remain constant during change of physical state of matter?

Answer 1

• The temperature remains constant during the change of state because the heat energy which is supplied to change the state of matter is used in breaking the intermolecular forces and other attractive forces.
• It is due to the latent heat as heat supplied to increase the temperature of the substance is used up to transform the state of matter of substance.
• Latent heat is defined as the heat or energy that is absorbed or released during a phase change of a substance.
• Hence, the temperature stays constant.
• The temperature remains constant as all the heat is used up and no external heat is released or absorbed.