Assertion : Melting of a solid causes no chan | vedclass

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(D) During the melting process,the temperature of the substance remains constant,but the heat supplied (latent heat) is used to overcome the intermole

Vedclass · Accepted Answer

If the Assertion is incorrect but the Reason is correct.

Vedclass · Answer

(D) During the melting process,the temperature of the substance remains constant,but the heat supplied (latent heat) is used to overcome the intermolecular forces of attraction between the particles of the solid.This process increases the potential energy of the molecules,which in turn increases the total internal energy of the system.Therefore,the Assertion is incorrect.Latent heat is defined as the amount of heat energy required to change the state of a unit mass of a substance without changing its temperature,which makes the Reason correct.Thus,the correct option is $D$.

Column-$I$	Column-$II$
$(a)$ Required heat to convert solid into gaseous.	$(i)$ Latent heat of fusion
$(b)$ Required heat to convert solid into liquid.	$(ii)$ Latent heat of vaporization

$Assertion :$ Melting of a solid causes no change in internal energy.
$Reason :$ Latent heat is the heat required to melt a unit mass of a solid.

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Column-$I$ Column-$II$

$(a)$ Required heat to convert solid into gaseous. $(i)$ Latent heat of fusion

$(b)$ Required heat to convert solid into liquid. $(ii)$ Latent heat of vaporization

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$Assertion :$ Melting of a solid causes no change in internal energy.$Reason :$ Latent heat is the heat required to melt a unit mass of a solid.