Register to reply

CHEM: Triple point Temp and Pressure

by ktmtalker
Tags: phase diagrams, triple point
Share this thread:
ktmtalker
#1
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)
lnp(liquid)=22.254-(3479.9K/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.
Phys.Org News Partner Science news on Phys.org
Study links polar vortex chills to melting sea ice
Lab unveil new nano-sized synthetic scaffolding technique
Cool calculations for cold atoms: New theory of universal three-body encounters

Register to reply

Related Discussions
C60 Triple Point? Chemistry 8
Why triple point of water is higher than freezing point Classical Physics 7
Temp of co2 under pressure General Physics 2
Calculating Dew-point from RH & Temp Introductory Physics Homework 4
Temp. and air pressure General Physics 6