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Entropy These processes are shown in reverse. The situations shown are so highly improbable that we would not expect to observe them in nature.
Thermodynamics
Endothermic Reaction Solid barium hydroxide octahydrate (Ba(OH)2*8H2O) and ammonium thiocyanate (NH4SCN) are mixed in a beaker, which is then placed on a few drops of water on a small board. The reaction that occurs is highly endothermic.
Thermodynamics : CalcDeltaG (14 Variations) Using , calculate the Gibbs free energy change for the following reaction which produces the metal zinc from its ore zinc(II) oxide. 2 ZnO(s) 2 Zn(s) + O2(g)
The Use of Limits in an Advanced Placement Chemistry CoursePaul S. Matsumoto, Jonathan Ring, and Jia Li (Lily) Zhu This article describes the use of limits in topics usually covered in advanced placement or first-year college chemistry. This approach supplements the interpretation of the graph of an equation since it is usually easier to evaluate the limit of a function than to generate its graph. Matsumoto, Paul S.; Ring, Jonathan; Zhu, Jia Li (Lily). J. Chem. Educ.2007, 84, 1655.
Acids / Bases |
Equilibrium |
Gases |
Mathematics / Symbolic Mathematics |
Thermodynamics
Discovering the Thermodynamics of Simultaneous Equilibria. An Entropy Analysis Activity Involving Consecutive EquilibriaThomas H. Bindel This activity explores the thermodynamics of simultaneous, consecutive equilibria and is appropriate for second-year high school or AP chemistry. Students discover that a reactant-favored (entropy-diminishing) reaction can be caused to happen if it is coupled with a product-favored reaction of sufficient entropy production. Bindel, Thomas H. J. Chem. Educ.2007, 84, 449.
Acids / Bases |
Equilibrium |
Thermodynamics
Microscopic Description of Le Châtelier's PrincipleIgor Novak The analysis based on microscopic descriptors (energy levels and their populations) is given that provides visualization of free energies and conceptual rationalization of Le Châtelier's principle. The misconception "nature favors equilibrium" is highlighted. Novak, Igor. J. Chem. Educ.2005, 82, 1190.
The Free EnergyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Thermodynamics
Gibbs Free Energy in BiologyJohn W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Thermodynamics |
Metabolism |
Bioenergetics
ChemPaths 104 W Mar 30John W. Moore Today in Chem 104:
* Lecture: Gibbs Free Energy
* Reading:
Kotz: Ch. 19, Sec. 5-7
Moore: Ch. 18, Sec. 5-8
* Homework #8 due by 11:55 PM F Apr 1
* Quiz in second discussion section this week.
* Lab this week is #11, Electrochemical Cells
2 SO3(g)
2 Zn(s) + O2(g) 
