why does the temperature fo a substance remain constant during the melting point or boiling point?
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because at the melting point or boiling point, the heat supplied by an external heat source doesn't get used up to increase the temperature of the substance, but to break the intermolecular forces of attraction between the particles of the substance...when the intermolecular forces of attraction between the particles of the substance are overcome, then only the temperature of the substance rises..
kushagra191:
and by the way at melting point this heat required to overcome the strong interparticular forces of attraction is called latent heat of fusion and at boiling point it is called latent heat of vaporization
(the temp. rises due to increase in kinetic energy)
yeah
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it is constant due to latent heat. latent heat is the amount of heat energy required to overcome the force between particles.
when we apply heat energy then at tue boiling/melting point of that substance the heat is used in overcoming the force of attraction btween particles thus the kinetic energy does not increses thus the temperature remains constant.
when we apply heat energy then at tue boiling/melting point of that substance the heat is used in overcoming the force of attraction btween particles thus the kinetic energy does not increses thus the temperature remains constant.
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