Class24 - Thermodynamics We are now equipped with equations...

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3/2/12 Oregon State University PH 202, Lecture 24 1 Thermodynamics We are now equipped with equations that relate T (the absolute temperature), K T.avg (the average kinetic energy of one particle), and E th (the total thermal energy of all particles) of a simple collection of ideal gas. Well, so what? Of what practical use is this? Can we somehow harness the thermal energy, E th , to do useful work? After all, every body has a temperature, so every body has a E th , a total thermal energy. Is there some way to direct that energy to do work ? Yes. Thermodynamics is the study of the harnessing—the transformation of randomly-bouncing, thermal kinetic energy into work (and vice versa). What sort of harnessing is possible?
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3/2/12 Oregon State University PH 202, Lecture 24 2 There are four “laws” of thermodynamics—four limitations to how heat and work can interchange; they operate on these principles: “Zeroth” Law: The definition of thermal equilibrium First Law: Energy is conserved. Second Law: Net heat flows only from T H to T C . Third Law:
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This note was uploaded on 03/10/2012 for the course PH 202 taught by Professor Staff during the Winter '08 term at Oregon State.

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Class24 - Thermodynamics We are now equipped with equations...

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