Good morning.

2021-01-19, 09:00, Tuesday. Got 4 for my exam (out of 5), which is good enough for me. I'm done with exams for this semester. And since I'm a nerd I'll tell you what the exam was about.

Solid Phase Thermodynamics. It is a separate course from thermodynamics in my uni, and for a good reason. Studying thermal properties in solid phase reactions is usually impossible (because thermal effects are small and the reactions themselves are slow), so there are a few tricks to do it.
The most important and versatile method is the EMF method, which allows to calculate Gibbs energy of the reaction using its' electrochemical properties. So we learned how to use it (how to compose electrochemical cells) and the thormodynamics specific for solid phases, like x-lg(pO2) diagrams.