Lect18-ch15_2

Lect18-ch15_2 - L18Ch15 Spring 2004 PHY 2053C: College...

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1 1 Spring 2004 PHY 2053C: College Physics A Today: The Laws of Thermodynamics First Law of Thermodynamics: (Yet another Name for Energy Conservation ) Second Law of Thermodynamics: What you always suspected: Disorder is Natural !! Mot i on , For c e s, Energy Heat Wave s Dr. David M. Lind, Dr. Kun Yang, Dr. David Van Winkle L18—Ch15 1 compress gas suddenly without heat flow (adiabatic): example: Adiabatic Process: flash tube U Q in W out Q in 0 T 0 Pressure increases and Temperature increases! decrease volume adiabatically (rapidly):
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2 1 Heat Engines Efficiency: Q H Q L W out e W Q H Q H Q L Q H 1 Q L Q H 1 Heat Engines: example: Steam Engine Q L W e W Q H Q H Q L Q H 1 Q L Q H Q H
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3 1 example: Automobile Engine 4-stroke Internal Combustion-Engine : burns gas => Heat => mech. Work Q H W out Q L W in e W out W in Q H Q H Q L Q H 1 Q L Q H 1 example: Refrigerator The trick is to make heat flow from inside to the outside , although T insid e < T outside !
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This note was uploaded on 10/11/2011 for the course PHY 2053 taught by Professor Lind during the Fall '09 term at FSU.

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Lect18-ch15_2 - L18Ch15 Spring 2004 PHY 2053C: College...

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