# Homework Help: How to approach this Brownian Motion Problems

1. May 22, 2013

### xiaozegu

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2. May 22, 2013

### clamtrox

Why do you think there's a difference? Isn't it just the universal gas constant in both cases?

3. May 22, 2013

### xiaozegu

Is Bolye's law's Ra equal to the R in the PV=NRT?
Bolye's law is PV = RaT

4. May 22, 2013

### clamtrox

Sorry, but that's gibberish. Read more carefully what is done.

The ideal gas law is PV = nRT, where n is the number of moles of gas, V is volume, p is pressure, T is temperature and R is the gas constant.

The form used in the book you quote has instead v = V/n, volume per mole, and reads Pv = RT.

5. May 22, 2013

### xiaozegu

Thanks. But I still do not know how to interpret the n and n0 in the after equation. Isn't n is 1 mol?

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