Le14 - ME 200 Thermodynamics I Lecture 14 Ideal gas...

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ME 200: Thermodynamics I Lecture 14: Ideal gas properties, Polytropic processes Reading: Sections 3.13-3.15; SP14, 3.119, 3.124 9/27/2010 1 ME200 Therm I Lecture 14, Prof. Mongia Professor Hukam Mongia Office Hours: MWF 9:30 to 10:30 AM in ME 83 Other times email for appointment; Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200/ Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100) Grader: Abhro Pal , [email protected]
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9/27/2010 ME200 Therm I Lecture 14, Prof. Mongia 2 Specific Heats of Ideal Gases Specific Heat at Constant Volume, is related to change in internal energy per unit change in temperature at constant volume Specific Heat at Constant Pressure, is related to change in enthalpy per unit change in temperature at constant pressure
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9/27/2010 ME200 Therm I Lecture 14, Prof. Mongia 3 SI Units: kJ/kg-K or kJ/kg C 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
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