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Le10 - ME 200 Thermodynamics I Lecture 10 Property tables...

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ME 200: Thermodynamics I Lecture 10: Property tables Reading: Sections 3.4-3.5; SP10, 3.26, 3.37 9/15/2010 1 ME200 Therm I Lecture 10, 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] Practice Exam on the course website Exam 1 on 9/20/10 during 8:00-9:00PM in EE129 Students with special needs: 7:30-9:00PM in ME101

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Property tables list “enthalpy” ( h ) and “entropy” ( s ) in addition to p , T , v and u More about entropy later in the semester (2 nd Law) Enthalpy: a property defined for simplicity and convenience Total enthalpy: H = U + p V Specific enthalpy: h = u + pv Commonly used in open system analysis (control volume) 9/15/2010 2 ME200 Therm I Lecture 10, Prof. Mongia Enthalpy
Thermodynamic relationships sometimes complex; tables provide easy way of listing relevant properties and looking them up during analysis Property information available for compressed liquid, saturated liquid, liquid-vapor mixture, saturated vapor, and superheated vapor for many pure substances Tables A-1 through A-27 (SI units); Tables A-1E through A-25E (USCS units) very important to understand structure for efficient problem solving! 9/15/2010 3 ME200 Therm I Lecture 10, Prof. Mongia Property Tables

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