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Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Reversibility , Irreversibility, Entropy in pure substance , Entropy change. PT.01
Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Rudolf Clausius 1865 1830s and 1840s Sadi Carnot
Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com ΰΆ» 𝛿𝑄 𝑇 ≀ 0 ‫ׯ‬ 𝛿𝑄 = 𝑄𝐻 βˆ’ 𝑄𝐿 > 0 Reversible Heat engine 𝑄𝐿 𝑄𝐻 π‘Šπ‘›π‘’π‘‘ P v 1 2 π‘Έπ’Šπ’ 𝑸𝑢𝑼𝑻 ∝ 𝒇 π‘»π’Šπ’ 𝒇(𝑻𝒐𝒖𝒕) ࢻ𝑓(π‘₯) 0 ΰΆ» 𝛿𝑄 𝑇 = 𝛿𝑄𝐻 𝑇𝐻 - 𝛿𝑄𝐿 𝑇𝐿 < 0 5 2 P v 1 2
Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com P v 1 2 ΰΆ» 𝛿𝑄 𝑇 = ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’A + ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’B A B C ΰΆ» 𝛿𝑄 𝑇 ≀ 0 0 𝛿𝑄𝐻 𝑇 βƒ’C 𝛿𝑄𝐻 𝑇 βƒ’A Independent of the path 𝛿𝑄𝐻 𝑇 Pressure ( P ) Temperature ( T ) Enthalpy ( H ) Entropy ( S ) ΰΆ» 𝛿𝑄 𝑇 = ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’c + ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’B
Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Comment with your questions

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9.pdf

  • 1. Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Reversibility , Irreversibility, Entropy in pure substance , Entropy change. PT.01
  • 2. Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Rudolf Clausius 1865 1830s and 1840s Sadi Carnot
  • 3. Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com ΰΆ» 𝛿𝑄 𝑇 ≀ 0 ‫ׯ‬ 𝛿𝑄 = 𝑄𝐻 βˆ’ 𝑄𝐿 > 0 Reversible Heat engine 𝑄𝐿 𝑄𝐻 π‘Šπ‘›π‘’π‘‘ P v 1 2 π‘Έπ’Šπ’ 𝑸𝑢𝑼𝑻 ∝ 𝒇 π‘»π’Šπ’ 𝒇(𝑻𝒐𝒖𝒕) ࢻ𝑓(π‘₯) 0 ΰΆ» 𝛿𝑄 𝑇 = 𝛿𝑄𝐻 𝑇𝐻 - 𝛿𝑄𝐿 𝑇𝐿 < 0 5 2 P v 1 2
  • 4. Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com P v 1 2 ΰΆ» 𝛿𝑄 𝑇 = ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’A + ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’B A B C ΰΆ» 𝛿𝑄 𝑇 ≀ 0 0 𝛿𝑄𝐻 𝑇 βƒ’C 𝛿𝑄𝐻 𝑇 βƒ’A Independent of the path 𝛿𝑄𝐻 𝑇 Pressure ( P ) Temperature ( T ) Enthalpy ( H ) Entropy ( S ) ΰΆ» 𝛿𝑄 𝑇 = ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’c + ‫׬‬ 1 2 𝛿𝑄𝐻 𝑇 βƒ’B
  • 5. Ahmed Medhat - Thermodynamics 1 - ahmedhatfa@hotmail.com Comment with your questions