CHEM 1E03 Chapter Notes -Gibbs Free Energy, Calorimeter, Compressed Fluid

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1E03
• Professor: Weisner

Document Summary

Enthalpies of reaction - hess" law, etc. We"ve discussed some physical processes - eg. dissolution of ionic solids (salts) in water - & some chemical reactions - precipitation, acid-base & redox in terms of changes of state and changes in molecular formula. Making/breaking of bonds, transfer of electrons, etc. When mgso4(s) dissolves in water, heat is liberated. When nh4no3(s) dissolves in water, heat is consumed. Thermochemistry deals with the accounting of heat transfer. We defer the question of what makes a process spontaneous till later when we take up entropy & gibbs free energy. Thermodynamics hinges on being very precise in our description of a system and its processes eg. types of systems: system has impermeable walls, but is not thermally insulated. Walls can be rigid or non-rigid system is sealed off outside world. No heat or matter flow across boundary.