The melting points and heats of fusion of o-, p-dinitrobenzene are 390.1 and 446

Question

The melting points and heats of fusion of o-, p-dinitrobenzene are 390.1 and 446.7K, and 16.33 and 14.00 kJ/mol, respectively. Assuming ideal solubility behavior, calculate the melting point for a solution of 10 mol% o-dinitrobenzene in 90 mol% p-dinitrobenzene.

Please use all the information given

6. The melting points and heats of fusion of o-, p-dinitrobenzene are 390.1 and 446.7 K, and 16.33 and 14.00 kJ/mol, respectively. Assuming ideal solubility behavior, calculate the melting point for a solution of 10 mol% o-dinitrobenzene in 90 mol% p- dinitrobenzene.

Explanation / Answer

If ideal solution then, we could take the average as follows:

Tmix = x1*Tm1 + x2*Tm2 .... + xn*Tmn

Tmelting for mix = 0.10*(309.1) + 0.90*(446.7)

Tmelt of mix = 432.94 K

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