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Q.

A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt, the latent heat required

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a

Is greater for the spring

b

Are the same for both

c

Is greater for the ball

d

For the two may or may not be the same depending upon the metal 

answer is A.

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Detailed Solution

Latent heat is independent of configuration. Ordered energy spent in stretching the spring will not contribute to heat which is disordered kinetic energy of molecules of substance. 

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