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Appreciating OxygenHilton 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
Calories - Who's Counting? JCE Editorial Staff Students determine how many calories are released per gram when marshmallows and cashews burn and then compare the quantity of energy available from carbohydrates vs. fats. JCE Editorial Staff . J. Chem. Educ.2004, 81, 1440A.
Calorimetry / Thermochemistry |
Carbohydrates |
Lipids |
Consumer Chemistry |
Food Science |
Nutrition |
Fatty Acids
Three Forms of EnergySigthór Pétursson Calculations comparing the energy involved in three forms: heat, mechanical energy, and expansion against pressure. Pétursson, Sigthór . J. Chem. Educ.2003, 80, 776.