Why does the temperature remain constant during changes of state?

By Ritesh|Updated : November 4th, 2022

The temperature remains constant in the changes of state as the heat energy is used to break the intermolecular interactions and other attraction forces. The quality of matter known as temperature reflects the energy that propels its individual particles. It is a gauge of how warm or cool a material is in relation to another. The coldest theoretical temperature is absolute zero.

Reason for Maintaining Temperature during State Change

  • The temperature is established during the transition of state due to the thermal energy required to change the state of a matter is utilised to dissolve intermolecular bonds and other forces of attraction.
  • The temperature stays constant because the heat supplied is sufficient to increase the substance's temperature and exhausts itself by changing the substance's state of matter.
  • As all heat is utilised and nothing outside releases or absorbs heat, the temperature stays constant as a result.
  • In essence, latent heat conversion uses heat.

Latent heat:

  • The term "latent heat" refers to energy or heat that is either released or absorbed during a phase change of a substance.
  • It could happen from a liquid to a solid or vice versa from a liquid to a gas. Latent heat is connected to the heat property known as enthalpy.
  • Any substance's temperature stays constant during a state change because the heat energy created is made use of to change the state of the substance and to break many bonds and attractive forces.

Summary:

Why does the temperature remain constant during changes of state?

As heat energy is employed to break the intermolecular bonds and other attraction forces, the temperature stays constant during state changes. Latent heat is the heat which is absorbed or released while change of phase in a substance.

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