Creating a Partial Pressure Diagram for the Cu-CO2-O2-H2O System
Skills and concepts that students must have mastered
Using Gibbs Free Energies to calculate Keq
How the activity is situated in the course
Content/concepts goals for this activity
Higher order thinking skills goals for this activity
Other skills goals for this activity
Description and Teaching Materials
An interactive powerpoint presentation walks students step-by-step through the process of generating the partial-pressure diagram for the Cu system and a Word document provides the thermodynamic data and instructions necessary to create their own diagram for the Fe system.
Tutorial_Creating a Partial Pressure Diagram for the Cu system (PowerPoint 2007 (.pptx) 1.2MB Oct29 21)
Data/Instructions for creating a Partial-pressure Diagram for the Fe System (Microsoft Word 2007 (.docx) 14kB Oct29 21)
Teaching Notes and Tips
I suggest going through the tutorial in class with the students allowing them to complete each step before clicking to show the correct answer to them on the screen. I also provide this tutorial to them so they can refer to it when they are doing their exercise for the Fe system.
Did they correctly calculate equilibrium gas pressures?
Did they plot lines correctly on diagram?
Did they correctly eliminate metastable reactions and stability-boundary extensions?
Did they correctly plot gas pressures provided and identify the stable mineral under those conditions?