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he normal freezing point of water is 0.0 degrees celsius. at this temperature the density of...

he normal freezing point of water is 0.0 degrees celsius. at this temperature the density of liquid water is 1.000 g/mL and density of ice is 0.917 g/mL. the increase in enthalpy for the melting ice at this temperature is 6010 J/mol. What is the freezing point of the water at 200 atms?

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Answer #1

Solution.

The curve along which a pure crystal and its melt maintain equal chemical potentials is given by an equation:

Let's suppose we have 1 mole of water, which weighs 18 g.

The volume of a liquid is Vl = 18/1 = 18 mL;

the volume of a solid is Vs = 18/0.917 = 19.63 mL;

the difference is 18-19.63 = -1.63 mL/mol.

T = 271.66 K, or -1.49 °C.

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