A substance is in the solid form at \( 0^{\circ} \mathrm{C} \). The...

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A substance is in the solid form at \( 0^{\circ} \mathrm{C} \). The amount of heat added to this substance and its temperature are plotted in the following graph. If the relative specific heat capacity of the solid substance is \( 0.5 \), find from the graph
(i) the mass of the substance ;
(ii) the specific latent heat of the melting process, and
(iii) the specific heat of the substance in the liquid state.
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