Shows that for simple fluids α C ≈ 5.8 ; and for non-simple fluids, α C increases with increasing molecular complexity. Comment on Lee/Kesler Correlations use for calculations of P r s a t are appropriate or not. Concept Introduction: According to Lee/Kesler correlations, for calculation of P r s a t the following equations are used: ln P r s a t ( T r ) = ln P r 0 ( T r ) + ω ln P r 1 ( T r ) Where ln P r 0 ( T r ) = 5.92714 − 6.09648 T r − 1.28862 ln T r + 0.169347 T r 6 And ln P r 1 ( T r ) = 15.2518 − 15.6875 T r − 13.4721 ln T r + 0.43577 T r 6

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Chapter 6, Problem 6.99P

Interpretation Introduction

Interpretation:

Shows that for simple fluids αC≈5.8 ; and for non-simple fluids, αC increases with increasing molecular complexity. Comment on Lee/Kesler Correlations use for calculations of Prsat are appropriate or not.

Concept Introduction:

According to Lee/Kesler correlations, for calculation of Prsat the following equations are used:

ln Prsat(Tr)=lnPr0(Tr)+ωlnPr1(Tr)

Where

lnPr0(Tr)=5.92714−6.09648Tr−1.28862lnTr+0.169347 Tr6

And

lnPr1(Tr)=15.2518−15.6875Tr−13.4721lnTr+0.43577 Tr6

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