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One mole of solid Cr2O3 at 2500 K is dissolved in a large volume of a liquid Raoultian solution of Al2O3 and Cr2O3, in which

One mole of solid Cr2O3 at 2500 K is dissolved in a large volume of a liquid Raoultian solution of Al2O3 and Cr2O3, in which XCr2O3 = 0.2 and which is also at 2500 K. Calculate the changes in enthalpy and entropy caused by the addi- tion. The normal melting temperature of Cr2O3 is 2538 K, and it can be assumed that Sm,Al2O3 = Sm,Cr2O3 .

Why didn't we take into account 2500 kelvins?

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