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4 Dec 2021

Given information

Distillation is a method of purification based on successive separations and recondensations of vapor above a solution. Use the result of the previous problem to calculate the mole fraction of chloroform in the vapor above a solution obtained by three successive separations and condensations of the vapors above the original solution of carbon tetrachloride and chloroform. Show how this result explains the use of distillation as a separation method.

 

Step-by-step explanation

Step 1.

Let's assume the two given compounds as and as

The mole fraction of the first successive separation of   is  

The mole fraction of the first successive separation of is calculated by,

 

 

the total vapor pressure of the first successive separation is calculated by,

   

Where,

  • is the mole fraction of first successive separation of .
  • is the vapor pressure of pure carbon tetrachloride.
  • is the mole fraction of first successive separation of  .
  • is the vapor pressure of pure chloroform.

Putting the values in the above equation we get,

 

 

 

 

 

 

 

 

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