Show that the osmotic pressure of a real solution is given by V=RT ln aA. Go on

Question:

Show that the osmotic pressure of a real solution is given by ΠV=–RT ln aA. Go on to show that, provided the concentration of the solution is low, this expression takes the form ΠV=ϕRT[B] and hence that the osmotic coefficient ϕ (which is defined in Problem 5E.2) may be determined from osmometry.


Data in Problem 5E.2

The osmotic coefficient ϕ is defined as ϕ=−(xA/xB) ln aA. By writing r=xB/xA, and using the Gibbs–Duhem equation, show that we can calculate the activity of B from the activities of A over a composition range by using the formula

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question
Question Posted: