Chapter 14, Problem 65E

Interpretation Introduction

Interpretation:

The molar mass of the polyisobutylene should be determined.

Concept introduction:

Osmosis is the diffusion of a fluid via a semi-permeable membrane. When solution is separated by a semi-permeable membrane, only solvent molecules are allowed to go through the membrane. The osmotic pressure of a solution is defined as the pressure difference required stopping this flow of solvent across the semi permeable membrane. The osmotic pressure is given by

$\pi =\frac{nRT}{V}$

p − osmotic pressure

n − number of moles

R − universal gas constant

T − absolute temperature

V - volume