If Raoults law applies for dilute solutions and osmotic pressure at equilibrium is estimated using the relationship (RT/Va) ln (Pa0/Pa) where R is 0.0881 atm/mol.K, T is in kelvin and Pa0 and Pa are the vapor pressure in dilute and concentrated solutions. Given that Va is 0.018 liter for water, estimate the osmotic pressure difference across a semi-permeable membrane with brackish water on one side and mineral free water on the other at 25 degC. If a yield of 75% is required, what is the minimum pressure needed to balance the osmotic pressure difference that will develop?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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If Raoults law applies for dilute solutions and osmotic pressure at equilibrium is estimated using the relationship (RT/Va) ln (Pa0/Pa) where R is 0.0881 atm/mol.K, T is in kelvin and Paand Pa are the vapor pressure in dilute and concentrated solutions. Given that Va is 0.018 liter for water, estimate the osmotic pressure difference across a semi-permeable membrane with brackish water on one side and mineral free water on the other at 25 degC. If a yield of 75% is required, what is the minimum pressure needed to balance the osmotic pressure difference that will develop?

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