Openstax_Chapter5.pdf - Chemistry 111 General Chemistry Chapter 5 Thermochemistry Dr Furqan Sami [email protected] Chapter 5 Objectives Energy Heat and

Openstax_Chapter5.pdf - Chemistry 111 General Chemistry...

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Chemistry 111 General Chemistry Chapter 5: Thermochemistry Dr. Furqan Sami [email protected]
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Chapter 5 Objectives Energy Heat and Work Exothermic, endothermic Enthalpy Heat Capacity Calorimetry Hess’s Law Standard Enthalpy of Formation
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Studying Chemical Energy Chemical “system” – part of the universe where chemical changes are taking place The reactants and products in a reaction “Surroundings” – includes everything else in the universe The reaction container, room, etc. Energy can be transferred between system and surroundings What we study is the exchange of energy between the system and the surroundings. Surroundings System Surroundings System
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Types of Systems Open system can easily and readily exchange both energy and matter with the surroundings Closed system can only exchange energy with the surroundings Isolated system cannot exchange energy or matter with the surroundings Energy Matter OPEN CLOSED ISOLOSED
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