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As a physicist, you put heat into a 500 ...

As a physicist, you put heat into a 500 g solid sample at the rate of `10.0 kJ//min`, while recording its temperature as a function of time. You plot your data and obtain the graph shown in figure.
.
(a) What is the latent heat of fusion for this solid?
(b) What is the specific heat of solid state of the material?

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D

(a) Between `t = 1 min` to` t = 3 min`, there is no rise in the temperature of substance. Therefore, solid melts in this time.
`L = Q/m = (HT)/m = (10 xx2)/0.5`
`=40kJ//kg`
(b) From `Q = msDeltaT or s = Q/(mDeltaT)`
Specific heat in solid state
`s = (10 xx 1)/(0.5 xx 15) = 1.33 kJ//kg-^@C`
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Knowledge Check

  • Two bodies of equal masses are heated at a uniform rate under identical conditions. The change in temperature in the two cases is shown graphically. The ratio of their specific heats in the solid state is

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