2. Determine graphically the partial molar volume of water and calculate the partial molar volume of sodium chloride in an aqueous solution with its mass fraction equal to 0.04, according to the following data:
ϕ2 0.01 0.03 0.05 0.07 0.10
Vsp*104, m3/kg 9.95 9.77 9.60 9.45 9.33

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