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For the textbook, chapter, and section you specified we found
5 Videos
14 Assessment Questions
394 Journal Articles
69 Other Resources
Videos: First 3 results
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.
Calorimetry / Thermochemistry |
Thermodynamics
Chemiluminescence  
Luminol and light sticks are demonstrated.
Thermodynamics |
Applications of Chemistry |
Consumer Chemistry
View all 5 results
Assessment Questions: First 3 results
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 : PredictEntropyChange (10 Variations)
For each of the following processes, indicate whether you expect the entropy change of the system to be positive or negative.
Thermodynamics
Thermodynamics : ConservGibbsEnergy (6 Variations)
Which of the following best illustrates conservation of Gibbs free energy?
Thermodynamics
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Journal Articles: First 3 results.
Pedagogies:
The Correlation of Binary Acid Strengths with Molecular Properties in First-Year Chemistry  Travis D. Fridgen
This article replaces contradictory explanations for the strengths of different binary acids in first-year chemistry textbooks with a single explanation that uses a BornHaber cycle involving homolyic bond dissociation energies, electron affinities, and ion solvation enthalpies to rationalize trends in the strengths of all binary acids.
Fridgen, Travis D. J. Chem. Educ. 2008, 85, 1220.
Acids / Bases |
Atomic Properties / Structure |
Aqueous Solution Chemistry |
Physical Properties |
Thermodynamics
Appreciating Oxygen  Hilton M. Weiss
Photosynthetic flora and microfauna utilize light from the sun to convert carbon dioxide and water into carbohydrates and oxygen. While these carbohydrates and their derivative hydrocarbons are generally considered to be fuels, it is the thermodynamically energetic oxygen molecule that traps, stores, and provides almost all of the energy that powers life on earth.
Weiss, Hilton M. J. Chem. Educ. 2008, 85, 1218.
Bioenergetics |
Metabolism |
Oxidation / Reduction |
Photosynthesis |
Thermodynamics
Undergraduates' Understanding of Entropy  Arnd H. Jungermann
Szbilir and Bennett carried out an extensive investigation on undergraduates understanding of entropy. Though I agree in general with their statements that orderdisorder arguments form a misleading entropy concept, I would like to make some comments with regard to a certain part of their online supplement.
Jungermann, Arnd H. J. Chem. Educ. 2008, 85, 1192.
Thermodynamics
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Other Resources: First 3 results
Molecular Models of Reactants and Products from an Asymmetric Synthesis of a Chiral Carboxylic Acid  William F. Coleman
Our JCE Featured Molecules for this month come from the paper by Thomas E. Smith, David P. Richardson, George A. Truran, Katherine Belecki, and Megumi Onishi (1). The authors describe the use of a chiral auxiliary, 4-benzyl-2-oxazolidinone, in the synthesis of a chiral carboxylic acid. The majority of the molecules used in the experiment, together with several of the pharmaceuticals mentioned in the paper, have been added to our molecule collection. In many instances multiple enantiomeric and diastereomeric forms of the molecules have been included. This experiment could easily be extended to incorporate various aspects of computation for use in an advanced organic or integrated laboratory. Here are some possible exercises using the R and S forms of the 4-benzyl-2-oxazolidinone as the authors point out that both forms are available commercially. Calculation of the optimized structures and energies of the enantiomers at the HF/631-G(d) level using Gaussian03 (2) produces the results shown in Table 1. Evaluation of the vibrational frequencies results in no imaginary frequencies and the 66 real frequencies are identical for the two forms. Examination of the computed IR spectra also shows them to be identical. Additionally, the Raman and NMR spectra can be calculated for the enantiomers and compared to experimental values and spectral patterns. A tool that is becoming increasingly important for assigning absolute configuration is vibrational circular dichroism (VCD). Although the vibrational spectra of an enantiomeric pair are identical, the VCD spectra show opposite signs, as shown in Figure 1. One can imagine a synthesis, using an unknown enantiomer of the chiral auxiliary, followed by calculations of the electronic and vibrational properties of all of the intermediates and the product, and determination of absolute configuration of reactants and products by comparison of experimental and computed VCD spectra. Using a viewer capable of displaying two molecules that can be moved independently, students could more easily visualize the origin of the enantiomeric preference in the reaction between the chelated enolate and allyl iodide.
Green Chemistry
Sorting recyclable plastics by density  Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Physical Properties |
Green Chemistry
Synthesis of Biodiesel Fuel  Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Stoichiometry |
Green Chemistry
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