Thermo Lecture 5

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Author:
Anonymous
ID:
5775
Filename:
Thermo Lecture 5
Updated:
2010-01-31 19:26:32
Tags:
Engineering Thermodynamics
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Thermo
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  1. Boundary Work
    • Wb = Wfric + Watm + Wcrank
    • Area under a PV curve is boundary work
  2. Work done during cycle
    Difference of work done by the system and on the system
  3. Boundary work with const. temp
    • assuming ideal gas
  4. polytropic process
    • expansion and compression of gases
    • PVn= constant
    • n = 0, const. P
    • n = infinity, const. V
    • n = 1, isothermal/ideal gas
    • n = k = Cp/Cv, adiabatic/idel gas
  5. Boundary work of polytropic process
  6. First Law for a cycle
    • Qnet - Wnet = deltaU, where U is zero
    • -> Qnet = Wnet

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