03) Phase Diagrams 9_5 - a solid from where it is a gas...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Phase Diagrams PTEC 3302 August 30th
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Important factors Temperature: Measure of the average kinetic  energy of the molecules (adding heat  increases energy, thus temperature is  increased) Pressure: reflection of the number of times  the molecules of the gas strike the walls of its  container Intermolecular forces: Forces of attraction  and repulsion between molecules
Background image of page 2
Phase diagram Graph of pressure plotted against  temperature MSN Encarta: Phase diagram for water
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Phase (PT) diagram Critical point: Upper limit of the vapor- pressure line (T c : critical temperature, and p c critical pressure, are the coordinates of the  critical point). Above critical temperature gas  cannot be liquefied, above critical pressure,  gas and liquid cannot coexist (pure  substances only) Triple point: Place where all three phases  exist at equilibrium
Background image of page 4
Phase (PT) diagram Sublimation-Pressure Line: Separates  conditions from where the substance is 
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: a solid from where it is a gas (Below triple point temperature) Melting Point Line: Separates solid and liquid conditions Vapor-Pressure Line: Between T and C Clausius-Clapeyron Equation Equation of the vapor-pressure line L v is the heat of vaporization of one mole of liquid, R is the universal gas constant Eq. 2 produces a straight line graph when the logarithm of vapor pressure is plotted against the reciprocal of absolute temperature -= + -= = 2 1 1 2 2 1 1 ln 1 ln T T R L p p C T R L p RT L p dT dp v v v v v v v v Cox Charts C-C equation produces straight line only if we assume the heat of vaporization is constant Cox charts produce a straight line by modifying the absolute temperature scale PV Diagram, Saturation envelope PVT Diagram...
View Full Document

Page1 / 10

03) Phase Diagrams 9_5 - a solid from where it is a gas...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online