Chem Lecture 12

Chem Lecture 12 - Sheet1 Page 1 Study sessions Tue 910-10am...

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Unformatted text preview: Sheet1 Page 1 Study sessions Tue 910-10am Tue 210-3pm Wed410-5pm Thurs110-2pm Work: Force acting over a known distance i.e. Work = Force x Distance Force: A push or pull exerted on an object. E.g. gravitational force Units of Energy: James Joule: SI Unit: Joule (J) 1J = 1kg m^2/S2 m^2 = meters squared S^2 = seconds squared 1 KJ (Kilojoule) = 1000 Joules 1 calorie (cal) = 4.184J System: The specific area of study. e.g. When studying a chemical reaction, the checmical reaction is our system Internal Energy (E) The Sum of all the kinetic and potential energies of a system-Change in internal energy: delta(triangle) E--- Heat HEat added to system: positive q-Heat = q Work done on system: positive w-Work = w Any relationship between change in internal energy, heat, or work?-Yes, change in internal energy = heat + work-> Delta E = q + w State Function( State property) A property of a system that depends only on the characteristics of its present state.-The value of a state function is independent of the pathway between the initial and final states->analogy: Traveling between Chicago (660' above sea-level) and Denver (5280' above sea level)-->Change in altitude (state function) is independent of route. Though the distance between cities may very, depending on the-->Change in altitude (state function) is independent of route....
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This note was uploaded on 05/06/2008 for the course CHEM 151 taught by Professor Campbell during the Spring '08 term at Lansing.

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Chem Lecture 12 - Sheet1 Page 1 Study sessions Tue 910-10am...

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