Q. 4

The temperature of a solid object is observed to be constant during a period. In this period.
A. heat may have been supplied to the body

B. heat may have been extracted from the body

C. no heat is supplied to the body

D. no heat is extracted from the body

Answer :

Heat change, ΔQ=mCΔT

Where,


ΔT=tempeature change


M=mass


C=heat capacity


Since the temperature is constant,


ΔQ=0,


The heat supplied might have been supplied to the body was used in the breaking the bond of the molecules, changing the state of the solid.


Thus, the temperature of the solid remains constant. In the period of heat may have been supplied to the body and heat may have been extracted from the body.

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