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?

Answer

A, B, C, D

Explanation

(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`