3473-11 Lecture Outline 15

3473-11 Lecture Outline 15 - same corresponding-states...

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15 – 1 of 1 CHE 3473 – Fa11 Whiteley Lecture 15 (9/26/11) Assigned Reading Generalized correlations for gases Smith, Van Ness, Abbott 7 th ed. (SVNA7) Ch. 3, pp. 99 - 108 Assignments Handouts (on web unless stated otherwise) HW 5 due Wed, Sep 28 Outline 1. Complete Lecture 14 2. Lee-Kesler generalized correlation for compressibility factor 3. Pitzer correlation for the second virial coefficient, B , and third virial coefficient, C Key Concepts 1. Lee-Kesler generalized correlation for Z provides good results for nonpolar and slightly polar gases and only requires knowledge of T c , P c , and ω . The Lee-Kesler values for Z 0 and Z 1 are provided in Appendix E. 2. Quantum gases (hydrogen, helium, and neon) are exceptions and do not conform to the
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Unformatted text preview: same corresponding-states behavior as do normal fluids. Special treatment required!!! 3. Use Pitzer correlation for the second virial coefficient, B , when the reduced temperature and pressure fall in the region above the dashed line in Fig 3.14 on p. 103. This avoids the need for table lookup and interpolation in Appendix E. Process conditions in many operating plants meet the conditions required for use of the Pitzer correlation for the second virial coefficient, B . Key Skills 1. Calculating specific volumes of gases using generalized correlations. 2. Determining when ideal-gas law is appropriate for density calculation....
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This note was uploaded on 10/11/2011 for the course CHE 3473 taught by Professor Staff during the Spring '08 term at Oklahoma State.

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