CHEM: Triple point Temp and Pressure

by ktmtalker
Tags: phase diagrams, triple point
ktmtalker is offline
Nov17-08, 09:30 PM
P: 4
1. The problem statement, all variables and given/known data
I need to calculate the temperature and pressure at the triple point. natural log of pressure of the liquid/solid: lnp(solid)= 29.411-(5893.5K/T) lnp(liquid)=22.254-(3479.9K/T). The compound is uranium hexafluoride, MW= 352.02. I do not believe the actual molecule matters to much, just the weight. pressure is in Pa.

2. Relevant equations
lnp(solid)= 29.411-(5893.5K/T)

3. The attempt at a solution
3. The attempt at a solution
I used P= 1 atm -->101.325kPa, and using the lnp(solid) equation determined a temperature. I then used that same temp in the lnp(liquid) to solve the other lnp equation. It did not go well. I am unsure on how to relate these two equations to the triple point. I should be able to grind through the math when I know how to relate it all.
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