Stuck on this question for a long time

[higherme]

Homework Statement

http://books.google.ca/books?id=iND...esult&ct=result&resnum=4#v=onepage&q=&f=false

The question is regarding Example 2.4, at the above link.
The question to find out what the unstated approximation is in that example. and re-calculate the answer w/o the approxiamtion.

Homework Equations

Virial equation
Ideal gas equation

The Attempt at a Solution

i'm thinking it's something to do with the molecular interactions? I'm so confused...

 

[higherme]

it assumed no molecular interactions? I would need to use the Van der waals equation to calculate molar volume?

 

[burningbend]

page won't let me read it

 

[higherme]

page won't let me read it

Really, it works for me. I found it using google books - book title: Physical Chemistry for the biosciences by Raymond Chang

 

[burningbend]

are you on a college campus? that might be why