Question

hii guys explain the role of latent heat in the change of state of a substance

Answer 1

✌️Hey ✌️

Here is ur answer :-

If the phase change of a substance involves a latent heat, then this is called a First Order phase transition. An ice cube takes time to melt, because of the latent heat. The same goes for the liquid to vapor phase change. BUT, as the temperature (and pressure) are raised toward the critical values, the latent heat for the liquid to vapor transition becomes smaller and reaches zero at the actual critical point.

There are some substances that have phase transitions that do NOT include a latent heat. These are referred to as Second Order phase transitions. The superfluid transition in liquid helium-4 is one example. Various ferromagnetic transitions are also second order. Essentially, the entire sample undergoes the transition at the same instant.

Answer 2

when a heat is given to a substance it's temperature increase however when heat is supplied to change the physical state of a substance there is no change in temperature the laten heat reduce the kinetic energy between the particle of substance and the attraction force between the particle is reduced so that's why it change it state