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Consider a mixture of methyl ethyl keytone(1) and water(2) at VLE at 1 atm pressure. If...

Consider a mixture of methyl ethyl keytone(1) and water(2) at VLE at 1 atm pressure. If the liquid phase consists of 50 mol% water, what is the composition of the vapor phase and at what temperature is the system? Answer these questions for the two cases below, and clearly state any additional assumptions.

a) Assume that VLE is described by Raoult’s Law.

b) Assume that VLE is described by Modified Raoult’s Law.

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Answer #1

Answer:-

a) According to the Roults Law,In an ideal liquid,the pressure exerted by a certain component on the gas is proportional to the vapour pressure of the pure liquid.The only thing that may prevent the liquid from exerting this much pressure is the fact that another component is present.Therefore, the partial pressure of the liquid component is:

PA = XA PA

According to the partial pressure of an ideal gas in a mixture is given by:

PA = yA P

Raoult's Law for component A

Raoult's Law for component A

yA P = XA PA

= 50

where is the vapor pressure of pure component A.

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