[teddypunkkari]

How can I calculate normal boiling point using Clausius-Clauperon equation? For example: for naphthalene vapour pressure of the liquid is 10 Torr at 85.8 C and 40 Torr at 119.3 C. How can I get the normal boiling point with this data?

[themark]

Hello,

Here are two hints:

1) Ln (P1/P2) =( delta Hvaporization/R)*(1/T2-1/T1): Look at the data given in the problem.  this equation has one unkwon and its a constant for that compound.

2) a liquid boils when its vapor pressure equals atmospheric pressure.

I hope this helps