Example 9.2-1 Effect of pressure on Thermal Conductivity of ethane
>  restart;
>  k0:=0.0159*Btu/(hr*ft*F); Given
>  Tc:=305.4*K; pc:=48.2*atm; From Appx E.1 in BS&L ed. 2 
>  T:=(153+460)/1.8*K;p:=191.9*atm; Given
>  Tr:=T/Tc;pr:=p/pc; Reduced temperature and pressure
>  krat:=4.7; From Fig. 8.8-2 in BS&L First Edition, this gives k/k0
>  k:=k0*krat;  The text ed 1 found 0.075 Btu/(hr*ft*F) and ed 2 using Fig. 9.2-1 found .0914 Btu/(hr*ft*F), but the experimental value is reported as 0.0453 Btu/(hr*ft*F)
[Maple Math]