Handout1001

Handout1001 - Lecture outline for Monday, October 1, 2007...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture outline for Monday, October 1, 2007 (Chem 100, section 2) Topic: Energy of phases transitions and temperature changes Start with Review of Energy/Enthalpy Concepts Tabulated heats of reactions Exothermic: system heats surroundings Endothermic: surroundings heat system H rxn E rxn (P V n gas RT is small) H rxn and E rxn are mostly due to bond breaking and formation Forming bonds releases energy (to surroundings) so exothermic H rxn and E rxn depend slightly on T, P Energetics of Phase Changes H fus = H rxn for X(s) X(l) H vap = H rxn for X(l) X( g ) (measures average intermolecular force (total, per molecule)) Generally 0 < H fus < H vap Intermolecular forces determine H fus , H vap , T m and T b Specific and Molar Heat Capacity c, and C (c s and C m ) Calorimetry Constant V: Consant P: Coffee cup calorimetry Imagine two step process for exothermic rxn....
View Full Document

This note was uploaded on 04/07/2008 for the course CHEM 100 taught by Professor Scarrow during the Fall '07 term at Haverford.

Ask a homework question - tutors are online