As a physicist, you put heat into a $500 g$ solid sample at the rate of $10.0 k J / m i n$ , while recording its temperature as a function of time. You plot your data and obtain the graph shown in figure. What is the latent heat of fusion for this solid in $k J / k g$ ?

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Solution

Given - $m = 500 g = 0.500 k g$ ,
rate of heat transfer $= 10.0 k J / m i n$ ,
we can see from the graph that the time taken by the solid to change into liquid is , $t = 3 - 1 = 2 m i n$ ,
hence , the heat given to solid in $2 m i n$ , will be , $Q = 10.0 \times 2 = 20 k J$ ,
now , the latent heat of fusion is given by ,
$L = Q / m = 20 / 0.500 = 40 k J / k g$

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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. What is the latent heat of fusion for this solid in kJ/kg?

Given - m=500g=0.500kg , rate of heat transfer =10.0kJ/min ,we can see from the graph that the time taken by the solid to change into liquid is , t=3−1=2min ,hence , the heat given to solid in 2min , will be , Q=10.0×2=20kJ ,now , the latent heat of fusion is given by , L=Q/m=20/0.500=40kJ/kg

As a physicist, you put heat into a $500 g$ solid sample at the rate of $10.0 k J / m i n$ , while recording its temperature as a function of time. You plot your data and obtain the graph shown in figure. What is the latent heat of fusion for this solid in $k J / k g$ ?