Questions
A substance of mass m kg requires a power input of P watt to remain in the molten state at its melting point. When the power is turned off, the sample completely solidifies in time t sec. The latent heat of fusion of the substance is:
detailed solution
Correct option is B
Equating energy supplied at time t with heat required for phase change, mLf=Pt ⇒ Lf=Ptm.Talk to our academic expert!
Similar Questions
Consider the following statements.
(A) The steam at 100°C causes more severe burn to human body than the water at 100°C.
(B) The steam has greater internal energy than water due to latent heat of vaporization.
Select the correct option.
(a) (A) is false but (B) is true.
(b) Both (A) and (B) are true.
(c) (A) is true but (B) is false.
(d) Both (A) and (B) are false.
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