Chem_215_Lecture_1_Color - Welcome to Chemistry 2150! H....

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Chapter 9: Thermochemistry Lab Starts Next Week Read Chapter 9.1-9.2 Looking Ahead: Chapter 9.3-9.6 Welcome to Chemistry 2150 ! H. Floyd Davis
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OPEN: exchanges both matter and energy with surroundings System Classification OPEN
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CLOSED exchanges only energy with surroundings System Classification OPEN CLOSED
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ISOLATED exchanges nothing with surroundings System Classification OPEN CLOSED ISOLATED
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• Energy, E: – Capacity to do work or produce heat. Law of Conservation of Energy (1 st Law of Thermo): Energy can be converted from one form to another, but can be neither created nor destroyed The energy of the universe (system + surroundings) is constant. Work, w: done when a force acts through a distance . Heat, q: involves transfer of E due to temp. difference. • Internal Energy of a system, E: – Sum of the kinetic and potential energies of all particles in system. – Internal energy of system is changed by a flow of work, heat or both: Δ E = q + w
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This note was uploaded on 09/10/2008 for the course CHEM 1732 taught by Professor Davis during the Fall '08 term at Cornell University (Engineering School).

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Chem_215_Lecture_1_Color - Welcome to Chemistry 2150! H....

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