Vapour pressure of a liquid in the temperature range of 200Kto 260K is given by this expression(adsbygoogle = window.adsbygoogle || []).push({});

ln (p/Torr) = 16.255 - 2501.8(T/K)

Calculate the enthaly of vaporization of hte liquid

since this is the liquid vapour boundary

[tex] p = p^* e^-\chi [/tex]

and [tex] \chi = \frac{\Delta H}{R} (1/T - 1/T^*) [/tex]

so then the ratio of Ln p to ln p* would yield the expression for chi which i cna then solve for delta H but it doesnt yield that same answer

what am i doing wrog here can you push (or shove) me iin the right direction

i have an exam today thus i need to answer this once and for all

thank you for help!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with finding enthalpy

**Physics Forums | Science Articles, Homework Help, Discussion**