Chem1202PReviewCh5

Chem1202PReviewCh5 - Chemistry 1202 Review/Preview Chapter...

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Chemistry 1202 Review/Preview Chapter Five Review Guide Dr. Saundra McGuire Spring 2007 Thermochemistry I. Definitions to Know and Understand System, Surroundings, Energy, Temperature, Heat, Potential Energy, Kinetic Energy, Work II. Heat and Energy A. Potential Energy - the amount of stored energy. B. Kinetic Energy = 1/2 mv 2 , where m is in kilograms and v is in meters/second. The units of the energy value derived in this manner is the joule. III. Work 1. Work = Force x distance , where force = pressure x area. The force due to gravity = mass x gravitational constant (9.8 m/s 2 ). IV. Internal Energy and the First Law of Thermodynamics A. First Law of Thermodynamics - The total internal energy of an isolated system is constant. B. State Functions - Functions whose value depends only on the present state of the system, not on the path used to arrive at the state. V. Relating E to heat and work A. The first law of thermodynamics is mathematically stated as follows: E = q + w where q is the heat exchanged and w is the work done. The sign conventions for work and heat are as follows: Work done on the system is positive; work done by the system is negative Heat entering the system is positive; heat going out of the system is
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This note was uploaded on 03/23/2011 for the course CHE 1201 taught by Professor Staff during the Summer '09 term at UC Davis.

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Chem1202PReviewCh5 - Chemistry 1202 Review/Preview Chapter...

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