3AL Lecture 3 - Melting Points and Mixed Melting Points...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Melting Points and Mixed Melting Points Goals: 1. Learn how to measure melting points 2. Learn how to use melting points to establish the purity of a compound
Background image of page 1

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

View Full DocumentRight Arrow Icon
A Solid (S) B C D E Liquid (L) S L Gas (G) L G Energy Added Temperature m.p., f.p. b.p. Changes in Temperature of a Compound at Constant Pressure B = melting point/freezing point. P solid = P liquid (P = Vapor Pressure) Temperature Constant from B to C. D = boiling point/condensation point. P liquid = P applied Temperature Constant from D to E.
Background image of page 2
A Pressure Versus Temperature Phase Diagram Curve CT = Vapor Pressure of a Solid at a Given T C T 1 P 1 T T P T T 3 P 3 Gas Solid Liquid Temperature Pressure T 2 P 2 T D E e.g T 1 = Sublimation Point at P 1 (Sublimation/Deposition Curve) Curve TD = Vapor Pressure of a Liquid at a Given T (Boiling Point/Condensation Curve) Line ET = Solid-Liquid Equilibrium P solid = P liquid e.g. T 2 = Boiling Point at P 2 e.g. T 3 = Melting Point at P 3 Point D = Critical Point (“Supercritical Fluid” is Formed) Point T = Triple Point (Solid, Liquid, and Gas are all in equilibrium)
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

3AL Lecture 3 - Melting Points and Mixed Melting Points...

This preview shows document pages 1 - 4. Sign up to view the full document.

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