Properties Of Solids And Liquids Question 3
Question: Assertion : Melting of solid causes no change in internal energy. Reason : Latent heat is the heat required to melt a unit mass of solid. [AIIMS 1998]
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: E
Solution:
Melting is associated with increasing of internal energy without change in temperature. In view of the reason being correct the amount of heat absorbed or given out during change of state is expressed $ Q=mL $ , where m is the mass of the substance and L is the latent heat of the substance.
