Phase diagram notes

1. Phase Diagrams
A phase diagram shows the conditions at which the
distinct phases of matter can occur at equilibrium.

2. Phase Diagram
Vaporization
Condensation
Sublimation
Deposition
Melting
Freezing

3. Phase Diagrams
Triple Point
The triple point of a
substance is the
temperature and
pressure at which
gas, liquid, and solid
coexist in
thermodynamic
equilibrium.
Gas
Liquid
Solid

4. Phase Diagrams
Triple Point
For water, the
combination of
pressure and
temperature are
exactly 0.010000 C
and 0.0060373 atm.
At that point, the
liquid can boil and
freeze at the same
time.
Gas
Liquid
Solid

5. Phase Diagram
According to the red line on the phase diagram,
if we apply enough pressure to ice, it will melt into liquid water.
What are the practical
applications?

6. Phase Diagram
According to the red line on the phase diagram,
if we apply enough pressure to ice, it will melt into liquid water.
Ice Skatingis one application
of this phenomenon.

7. Phase Diagrams
Carbon dioxide
Dry Ice

8. Phase Diagrams
Dry Ice
Carbon dioxide has
a vapor pressure of
830 psi (56.5 atm)
at 20 C.
At 0 C the pressure inside a CO
2fire extinguisher is
about 500 psi. At 30 C it is about 1000 psi.

9. Phase Diagrams
Carbon