While performing some practice problems (it’s been a long time since I graduated as a chemical engineer, have not fully applied the knowledge over time so decided to review some concepts). I was looking for some material properties. Found the appendices of “Ludwig's Applied Process Design for Chemical and Petrochemical Plants” 4th Edition” online.

Specifically at Appendix C, table C-16 “Solubility of Selected Gases in Water as a Function of

Temperature” The formula is not working for me. The resulting values are out of range. I’ve been looking online for possible things I may be doing wrong, but not successful. Also looked with no success for reference to check if there is an error in the formula or the correlation constants. The formula is: (T in K, I assume log_{10}.)

log xwt = A + B/T + C log T + DT

(Have seen correlations that include a fifth correlation constant E times T^2)

Using the first material on the table to verify my results with the value provided at 25ºC

When I do the calculation, it returns an error because Log x = 2322.67, and 10^2322.67 is out or range.

I have found in other resources that the given x at 25C is correct (true for various of the substances given in this appendix C) so the formula, the constants, or my math are wrong!

Can someone provide some guidance?

**Edited by JPT@Victoria, 15 November 2019 - 02:47 PM.**