for any substance why does the temperature remain constant during the change of state Related: NCERT Solutions - Matter In Our Surroundings?

Question

for any substance why does the temperature remain constant during the change of state Related:  NCERT Solutions - Matter In Our Surroundings?

Answer

Due to the latent heat of fusion and vapouration...

Answer

When the ice is melted, the heat which is given to it is used by its particles which increase their  kinetic energy and they start to vibrate more faster than before.A stage is reached when the particles move freely and leave their fixed position.Hence the heat is used by the particles of  matter and the temperature remain constant. (Here ,Ice is only used for example)Hope it will help you!!!!

Answer

Because it absorb heat to overcome force of attraction that is latent heat of fusion and vaporation

Answer

Explanation for constant temperature during change of state:

Latent heat:
- When a substance changes its state from solid to liquid or liquid to gas, the temperature remains constant because the energy supplied is used to overcome the forces of attraction between the particles rather than increase the kinetic energy of the particles.
- This energy is called latent heat and is absorbed or released during the change of state.

Molecular arrangement:
- During a change of state, the particles in the substance rearrange themselves to form a new structure.
- In the case of melting or boiling, the particles break free from their fixed positions in the crystal lattice or liquid structure, respectively.
- This rearrangement requires energy, which is why the temperature remains constant.

Equilibrium:
- At the point of change of state, the substance is in equilibrium, meaning that the energy supplied is used to break or form intermolecular bonds rather than increase the temperature.
- Once all the particles have changed state, then the temperature starts to increase again.

Graphical representation:
- If we were to plot a graph of temperature against time during a change of state, we would see a plateau where the temperature remains constant.
- This plateau corresponds to the time when the substance is changing state, and the energy is being used to overcome intermolecular forces.

Conclusion:
- In conclusion, the temperature remains constant during a change of state because the energy supplied is used to overcome intermolecular forces rather than increase the kinetic energy of the particles. This process is essential for the substance to change its state while maintaining thermal equilibrium.

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