Variation of vapor pressure with temperature

Join the discussion
Registration is free. Start your own thread to ask a follow-up.
3 replies · 3K views
utkarshakash
Gold Member
Messages
852
Reaction score
13

Homework Statement


The following link shows the variation of vapor pressure with temperature. In which way the data should be plotted to obtain a straight line?

http://www.chem.purdue.edu/gchelp/liquids/vpress.html


The Attempt at a Solution



For this, I need to know exactly the mathematical relationship which I can't seem to find anywhere. Anyways, my immediate guess would be that the graph is an exponential function. So plotting the graph of lnP vs T would give me a straight line but the correct answer is lnP vs 1/T. I'm sure I'm missing something here.
 
Physics news on Phys.org
This is the one component, two phase (solid-gas, liquid-gas) "version" of the Clausius-Clayperon equation.