Question

Explain why temperature remains constant during the inter conversion of the states of matter?

Answer 1

• The temperature remains constant during the interconversion of the states of matter because the heat supplied is used up in the conversion of one state of matter into another.
• The supplied heat is utilized to break the bond of attraction between the particles. So, the temperature of the substance does not rise even when heat is supplied to it. Therefore, the interconversion of states of matter occurs at a constant temperature.
• For example, when ice is heated, the temperature of the system does not rise till all the ice is melted.
• This is because the heat gets used up in changing the state by overcoming the forces of attraction between the particles.
• As this heat energy is absorbed by ice without showing any rise in temperature, it is considered that it gets hidden in the contents of the beaker and is known as the latent heat.