Chemical Reactions (29:00)
What do fireworks, a fried egg, and a rusting truck have in common? They all involve chemical reactions. This program illustrates the mechanics of chemical reactions in five sections: Chemical Reactions (reactants and products, state changes, diatomic elements and molecules, Law of Conservation of Mass); Chemical Bonding (Octet Rule, ionic and covalent bonds); Types of Chemical Reactions (synthesis and decomposition reactions, single and double displacement reactions, acid/base reactions, exothermic and endothermic reactions); Reaction Rates (moles, kinetic energy, solutes and solvents, catalysts, activators and inhibitors, enzymes); and Reactions All Around Us (photosynthesis and chemosynthesis, autotrophs and photoautotrophs, bioluminescence). A viewable/printable instructor’s guide is available online. A Films for the Humanities & Sciences Production. A part of the series Essential Chemistry. (28 minutes)
Chemical Reactions and Changes in State (04:19)
During a chemical reaction, a new substance is formed. Fireworks, a rusting vehicle, and frying eggs involve chemical reactions. Changes in state (e.g. liquid to gas) always involve a physical change.
Types of Chemical Reactions (03:55)
Many chemical reactions follow predictable patterns. Reaction types include synthesis, decomposition, single displacement, double displacement, and acid/base reactions.
Chemical Reaction Rates (02:35)
The speed of a chemical reaction is called its reaction rate. The product of a chemical reaction is measured in grams, kilograms, or moles.
Variables affecting reaction rate include temperature, pressure, and reactant particle size.