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A Solid of Mass M Initially at T0 Is Heated psol\mathrm{}_{\mathrm{p}}^{sol}

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A solid of mass m initially at T0 is heated to T1 at constant pressure where it proceeds to melt. Once all of the solid is in the liquid phase it is further heated to T2. If the solid and liquid have specific heat capacities of c psol\mathrm{}_{\mathrm{p}}^{sol} and c pliq\mathrm{}_{\mathrm{p}}^{liq} respectively, which equation below best represents the change in entropy for this system?


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