che294f02project02

# che294f02project02 - CHE/MAE 294 F02 Project 2 Amendments 2...

This preview shows pages 1–2. Sign up to view the full content.

Amendments 2 on September 9, 2002 CHE/MAE 294 F02, Project 2 due Wednesday, September 11, 2002 Potential Energies of Chemical Bonds Instructions You must follow the requirements for project reports. You must turn in a hard copy of the report. Computer disks and computer ﬁles are not required. Failure to complete this project will result in a failing grade for the class. This project is best done with a symbolic math program such as Maple or MathCad. If you use a spreadsheet or other graphing program to create the plot, you are responsible for justifying that you have used a sufﬁcient number of discreet data points in the curve to represent the true shape of the analytical function. Project Statement Background The potential energy of a chemical bond V b (J/bond) is related to the force of the bond F b (N/bond) as the work done is separating the atoms or molecules V b F b dr ,whe re r is the separation distance of the bond. Two types of bonds have been presented in class [1], Hook’s law bonds where F b kr , and ionic bonds, where F b F c F n . In Hook’s law bonds, k is the bond constant (N/m). In ionic bonds, the Coulombic and nuclear terms are given as F c k o Z 1 Z 2 q 2 r 2 2 F n λ exp r ρ In the above, k o 9 10 9 Vm /C , Z i are the valences of the ions in the bond, q is the charge on an electron (1 601 19 λ (N/bond) and ρ (m) are constants used to ﬁt the repulsive portion of the ionic bond force curve. Integration of the force expression for Hook’s law bonds gives the potential energy of the bond V b HL in J/mol as V b HL 1 2 kN o r r o 2 D o where r o is the equilibrium bond distance (m),

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

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

## This document was uploaded on 11/07/2011.

### Page1 / 3

che294f02project02 - CHE/MAE 294 F02 Project 2 Amendments 2...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online