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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
Bromine Reactions and explosions involving bromine are demonstrated.
Thermochemistry : SystemSurrExoEndo (4 Variations)
Sulfuric acid is added to water in a beaker and the resulting solution is much warmer than either the water or acid was initially.
Identify the following items as being part of the system or the surroundings, and indicate whether the process is exothermic or endothermic.
[#94] Hold the Heat: Global Heat Retention, Global Warming and CalorimetryJoel D. Burley and Harold S. Johnston Students perform quantitative calorimetric measurements on samples of ice/water heated by incandescent light bulbs and by convection with room-temperature surroundings. Burley, Joel D.; Johnston, Harold S. J. Chem. Educ.2008, 85, 224A.
Calorimetry / Thermochemistry
J. Chem. Educ. 1999,76, 1578–1583John Andraos Corrections to the article A Streamlined Approach to Solving Simple and Complex Kinetic Systems Analytically. Andraos, John. J. Chem. Educ.2008, 85, 1624.
Kinetics |
Mechanisms of Reactions |
Theoretical Chemistry
The Correlation of Binary Acid Strengths with Molecular Properties in First-Year ChemistryTravis 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 BornHaber 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.
