CHEM 1210 Lecture Notes - Lecture 7: Stoichiometry, Activation Energy
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Chemical reactions: reactants combine to form products. Stoichiometry: the study of mass relationships in chemical reactions: % yield= actual experimental yield/theoretical calculated yield. Redox reactions (oxidation/reduction: oxidation (charge increases) Loss of electrons: reduction (charge decreases) Gain of electrons: remember: leo says ger . Gain of electrons reduction: an oxidizing agent is a substance that is reduced. It allows the other substance to be oxidized: a reducing agent is a substance that is oxidized. It allows the other substance to be reduced. Oxidizing antiseptics: agents that kill bacteria by oxidation. Hot or cold: a reaction that releases heat is called exothermic, a reaction that absorbs heat is called endothermic. Catalysts are not used up in a reaction: the activation energy (ea) is simply the minimum energy required for the reaction to occur. To burn paper, a spark provides this activation energy: chemical equlibrium. Many actions are reversible and eventually reach equilliubruim.
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