Hannahdavy6372 Hannahdavy6372

30-01-2020
Chemistry

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7. Prestone, (ethylene glycol, antifreeze, HOCH2CH2OH) is the liquid dissolved in water used in automobile cooling #7) systems. Find the vapor pressure of a 2.000 L solution that was prepared by mixing equal volumes of antifreeze and water together at 100oC. Assume this solution obeys ideal conditions (Raoult’s). hint: You will need to find the density for each solute & solvent present in solution & water at 100oC.

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olumidechemeng olumidechemeng

30-01-2020

Answer:

Vapor pressure = 0.7566atm

Explanation:

The approach applied is raoult's law of ideal solution which says that the vapor pressure of a solvent in a solution is equal to the vapor pressure of the pure solvent multiplied by the mole fraction in the solution.

Mathematically, pA = NA x P'A

pB = NB x p'B

And, pT = pA + pB, not all liquids obey raoult's law, the mixtures which obey roault's law are called IDEAL SOLUTIONS.

The step by step calculations is shown in the attachment

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