Physics - Heat & Thermo Question with Solution | TestHub

Heat is supplied at a uniform rate $P$:
$$P=mc\frac{dT}{dt}\Rightarrow c=\frac{P}{m(dT/dt)}$$
In the graph the solid line is less steep than the liquid line, so $dT/dt$ is smaller for the solid.
$$c_{\mathrm{solid}}>c_{\mathrm{liquid}}$$
The solid to liquid flat part is shorter than the liquid to vapour flat part, so $L_f<L_v$.