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![Page 1: Physics 202, Lecture 6 - Spotlights | Web services at …spot.pcc.edu/~dulrich/2013p202/2013p202ln06.pdf · Work done by an ideal gas within isothermal and adiabatic process can be](https://reader031.vdocuments.us/reader031/viewer/2022030913/5b5d36ab7f8b9a9c398da1ee/html5/thumbnails/1.jpg)
Thermodynamics
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![Page 2: Physics 202, Lecture 6 - Spotlights | Web services at …spot.pcc.edu/~dulrich/2013p202/2013p202ln06.pdf · Work done by an ideal gas within isothermal and adiabatic process can be](https://reader031.vdocuments.us/reader031/viewer/2022030913/5b5d36ab7f8b9a9c398da1ee/html5/thumbnails/2.jpg)
The first law: a heat engine balances internal energy, heat and work
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The ideal gas provides the simplest system to consider in thermodynamics
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![Page 4: Physics 202, Lecture 6 - Spotlights | Web services at …spot.pcc.edu/~dulrich/2013p202/2013p202ln06.pdf · Work done by an ideal gas within isothermal and adiabatic process can be](https://reader031.vdocuments.us/reader031/viewer/2022030913/5b5d36ab7f8b9a9c398da1ee/html5/thumbnails/4.jpg)
Work done by an ideal gas within isothermal and adiabatic process can becalculated
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![Page 5: Physics 202, Lecture 6 - Spotlights | Web services at …spot.pcc.edu/~dulrich/2013p202/2013p202ln06.pdf · Work done by an ideal gas within isothermal and adiabatic process can be](https://reader031.vdocuments.us/reader031/viewer/2022030913/5b5d36ab7f8b9a9c398da1ee/html5/thumbnails/5.jpg)
The Carnot heat engine is reversible and is therefore the upper bound onefficiency
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Another perspective on entropy: energy irreversibly lost to mechanicalwork
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Any decrease in system entropy must come from a larger increase some-where else
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Practical questions about the most efficient use of global energy is chal-lenging
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Nearly all electricity generated in the US comes ultimately from steamengines
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