"Annenberg/CPB Collection." . . "Chemical reaction, Conditions and laws of." . . "Chemical kinetics." . . . . . . . . . . . . "The Driving forces" . . . "Endothermic and exothermic reactions are investigated and the role of entropy is revealed."@en . . "The Driving forces"@en . . . "The driving forces"@en . "The driving forces" . . . . . . . . . . . . . . . . . . . . "Video"@en . . . "Digital video"@en . . "Hoffmann explains why chemical reactions occur, what happens during a chemical reaction, and what governs the speed with which a reaction takes place."@en . . . . . "Explains why chemical reactions occur and what governs the rate of reaction, then uses experiments to illustrate endothermic and exothermic reactions and the role of entropy. Suggested audience: senior secondary."@en . . . . . . . . . "Program 13 xplains why chemical reactions occur and what governs the rate of these reactions. Investigates endothermic and exothermic reactions and reveals the role of entropy. Program 14 looks at molecules during chemical reactions and the role that catalysts play in chemical transformations."@en . . . "Streaming multimedia"@en . . . . "Molecules in action" . "Molecules in action"@en . . . "The 1st program explains why chemical reactions occur and what governs the rate of these reactions. Also investigates endothermic and exothermic reactions and reveals the role of entropy. The 2nd program explains the role that catalysts play in chemical transformations and demonstrates the state of dynamic equilibrium, which allows chemists and chemical engineers to change reaction conditions." . "Explains why chemical reactions occur and what governs the rate of these reactions; investigates endothermic and exothermic reactions and reveals the role of entropy." . "Video recordings for the hearing impaired"@en . "Explains why chemical reactions occur and what governs the rate of these reactions. Also investigates endothermic and exothermic reactions and reveals the role of entropy."@en . . . . . . . . . . . "The first program explains why chemical reactions occur and what governs the rate of these reactions. Also investigates endothermic and exothermic reactions and reveals the role of entropy. The second program explains the role that catalysts play in chemical transformations and demonstrates the state of dynamic equilibrium, which allows chemists and chemical engineers to change reaction conditions."@en . . . . "Explains why chemical reactions occur and what governs the rate of these reactions. Investigates endothermic and exothermic reactions and reveals the role of entropy."@en . . "Reactions and their driving forces"@en . "Explains why chemical reactions occur and what governs the rate of these reactions."@en . . . "\"Endothermic and exothermic reactions are investigated and the role of entropy is revealed.\"--Container."@en . . . . "Annenberg/CPB Project." . . . . "Educational Film Center (Annadale, Va.)" . . "Magic Lantern Communications." . . "Chemical reactions." . . "University of Maryland, College Park." . . "Alberta. Alberta Learning. Learning Resources Centre." . .