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lecture11 - PropertyTables ME200 ThermodynamicsI Lecture10...

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9/16/2010 1 Property Tables ME 200 Thermodynamics I Purdue University , Dr. Tim Pourpoint – [email protected] Lecture 10 September 14 th , 2010 Last Lecture • Defined enthalpy Neglecting the heat capacity of the calorimeter: Ǫ reaction = – Ǫ solution Ǫ solution = m c Δ T d di i bl Where: Ǫ = heat (joule) m = solution mass (g) c = the specific heat of solution (J/g C) Δ T = Tfinal – Tinitial = the change in temperature ( C or K) ME 200 2 • Started discussion on property tables: • Define quality (ratio of mass vapor to total mixture mass) • Solved three examples with use of property table
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9/16/2010 2 • More on Property Tables • Linear interpolation • Several more examples Today and next lecture ME 200 3 • Determine what is the state of the substance (CL, SL, SLVM SV SHV) Thi k b h i d d i i i Property Tables • Think about what independent intensive properties are available (recall state postulate) • Select appropriate table (if not, need to implement suitable approximation) ME 200 4 • Make sure that you look up properties with consistent reference states – otherwise the analysis will be wrong!
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