
Concept explainers
Interpretation:
The molar mass of polychloroprene and its second osmotic virial coefficient has to be calculated.
Concept Introduction:
When large molecules dissolve to produce solutions that are not ideal solutions, it is assumed that the Van’t Hoff equation is the first term of the virial like expansion. The osmotic virial equation is,

Answer to Problem 5B.9P
The molar mass of polychloroprene is
Explanation of Solution
The equation used to determine the molar mass from osmotic pressure is,
Where,
The given data is,
The plot of
Figure 1
From the plot intercept is
The intercept of the plot of
The value of
The conversion of temperature,
The value of
The value of
The conversion of
Substitute the values of
The molar mass of polychloroprene is
The slope of the plot of
Substitute the value of
The conversion of
Hence, the conversion of
The value of second osmotic virial coefficient is
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Chapter 5 Solutions
Atkins' Physical Chemistry
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