Question

Why does the temp. of substances remain constant during melting and boiling point?
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Answer 1

Answer:

The ‘temperature of a substance’ remains constant during its melting and boiling point because the change in any state of matter as n solid to liquid or the liquid to a gas involves crossing the ‘latent heat of fusion’ which causes a change in the intermolecular spacing of the molecules in the substance.

The temperature of a substance ‘latent heat of fusion’ should cross to free the molecules from a packed solid state to a liquid state. Similarly the intermolecular forces should become freer flowing to convert it into gas

Answer 2

Answer:The temperature of the substances remain constant because of the property of latent heat. The substances absorb heat or cold to change their state. Whereas, the extra heat acquired is stored in the form of latent heat

Explanation: