3 vapor pressure problems for lots of points Calculate the weight of benzene cod

Question

3 vapor pressure problems for lots of points

Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4 degree C. The vapor pressure of water at 69.4 degree C is 227.7 mmHg. Compare the result with the data in Table 18.1. Calculate the approximate boiling point of a mixture of bromobenzene and water at atmospheric pressure. A table of vapor pressure of water and bromobenzene at various temperatures is given. Calculate the weight of nitrobenzene that codistills (bp 99 degree C of mixture) with each gram of water during a steam distillation. You may need the data given in problem 2.|

Explanation / Answer

answer 3 :

Similar problem will help you..

A natural product, (MW =150) distills with steam at a boiling temperature of 99 degrees C at atmospheric pressure. The vapor pressure of water at 99 degrees C is 733 mmHg.
1) Calculuate the weight of the natural product that codistills with each gram of water at 99 degrees C.

solution:
This is the basis for the calculations:
Pa/Pb = moles(a)/moles(b)
1)
Lets use moles(a) as the natural product.
Pa = 760-733 = 27 mm
Pb = 733 mm
moles(b) = 1.00 g/18.0 g/mole = 0.055 moles

mole(a) = 0.00203 moles
0.00203 mole x (150 g/mole) = 0.304 g

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