2009-11-10 - Thermodynamics, First Law

2009-11-10 - Thermodynamics, First Law - Chapter 9:...

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Chapter 9: Thermodynamics, First Law References: - Chemical Principles, Steven S. Zumdahl, Fifth Edition, Houghton Mifflin Custom Publishing, Boston, MA - Professor Paul Mc Cord Notes, CH 301, University of Texas at Austin 1
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1 – ENERGY Energy : Capacity to do work or to produce heat Law of conservation of energy : Energy can be converted from one form to another but can be neither created nor destroyed. Some of the energy of ball A will be transferred as heat – frictional heating - (interaction between the rough surface if the hill and the ball). Some of the energy of ball A will be transferred as work – force acting over a distance - There are two ways to transfer energy : through work and through heat Total energy transferred will be constant, but the amounts of heat and work will differ. Energy change is independent of the pathway, but work and heat are not State function : The value of a state function does not depend on how the system arrived at the present state. A change in this function (property) in going from one state to another is independent of the particular pathway.
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System : Part of the universe on which we wish to focus attention Surroundings : Everything else in the universe Exothermic : Energy flows out of the
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This note was uploaded on 03/06/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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2009-11-10 - Thermodynamics, First Law - Chapter 9:...

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