Lect15ME200Divs2&5IdealGasPolyProcSP2012

Lect15ME200Divs2&5IdealGasPolyProcSP2012 - ME 200:...

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ME 200: Thermodynamics I Lecture 15: Specific Heats Ideal Gas Properties
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Last Lecture Equations of State » Relationship between p , v and T for a pure substance Ideal Gas Equation of State » Applicable at low pressures and high temperatures Compressibility Factor » A measure for deviation from ideal gas behavior » Generalized compressibility chart
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This Lecture Ideal Gas Properties Continued Specific Heats, Internal Energy, and Enthalpy for Ideal Gases Polytropic Processes
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Specific Heat (cont.) Specific Heat at Constant Volume ( c v ) » c v is related to change in internal energy per unit change in temperature at constant volume Specific Heat at Constant Pressure ( c p ) » c p is related to change in enthalpy per unit change in temperature at constant pressure v v u c T    p p h c T
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Specific Heat (cont.) SI Units: kJ/kg-K or kJ/kg C » Equivalent since only change in temperature is relevant i.e. T(ºC) = T(K) » Molar Specific Heats: kJ/kmol-K or kJ/kmol C USCS Units: Btu/lbm- R or Btu/lbm- F Specific heats , in general, depend on temperature and pressure; pressure dependence usually small but
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This note was uploaded on 01/26/2012 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue.

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Lect15ME200Divs2&5IdealGasPolyProcSP2012 - ME 200:...

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