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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 : CompareEntropyQual (16 Variations) Indicate which substance in each of the following pairs of substances you expect to have higher entropy. Assume that you have a mole of each substance and all substances are at the same temperature.
Thermodynamics
Thermodynamics : ProbabilityEnergyDist (23 Variations)
Consider a system that has two indistinguishable molecules that can occupy three different energy levels (having energies of 1kJ, 2kJ and 3kJ, respectively). What is the probability that the molecules will have a total energy of 2 kJ?
Configurational Entropy RevisitedFrank L. Lambert Positional entropy should be eliminated from general chemistry instruction and replaced by emphasis on the motional energy of molecules as enabling entropy change. Lambert, Frank L. J. Chem. Educ.2007, 84, 1548.
Statistical Mechanics |
Thermodynamics
What Are Students Thinking When They Pick Their Answer?Michael J. Sanger and Amy J. Phelps 330 students were asked to answer a multiple-choice question concerning gas properties at the microscopic level and explain their reasoning. Of those who selected the correct answer, 80% provided explanations consistent with the scientifically accepted answer, while 90% of the students who picked an incorrect choice provided explanations with at least one misconception. Sanger, Michael J.; Phelps, Amy J. J. Chem. Educ.2007, 84, 870.
Measuring the EntropyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Thermodynamics
Getting Acquainted with EntropyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Thermodynamics
ChemPaths 104 M Mar 28John W. Moore Today in Chem 104:
* Lecture: Entropy
* Reading:
Kotz: Ch. 19, Sec. 1-4
Moore: Ch. 18, Sec. 1-4
* Homework #8 due by 11:55 PM F Apr 1
* Quiz in second discussion section this week
