Midterm 2 Solutions for Thermodynamics and Chemical Engineering Problems, Exams of Engineering Chemistry

Download Midterm 2 Solutions for Thermodynamics and Chemical Engineering Problems and more Exams Engineering Chemistry in PDF only on Docsity! 140 Midterm 2 Solutions Problem 1 Solution: Steam Table Data: € z = P ˆ V RT = 500bar(.003882m3 /kg)(1000L /1m3)(18kg /1000mol) .08314Lbar /molK(773K) z = 0.544kg Compressibility Chart: € Tr = T Tc = 773K (347 + 273)K =1.25 Pr = P Pc = 500bar 221.2bar = 2.26 *credit was also given for using Tc=647K (value given in book) z=0.625 Compare: Value from compressibility chart is greater. Compressibility chart gives a value closer to ideal gas than steam table. Problern 2 B a balowsce ov ey limotriead shetl ~PRTr LAs} fp fen, d a arf, (- a OSH )eo ee ar ae S(t dee = > race =A, infer atin g once more @ fdeas Cn =Afdr 2 hitak + Aa - applyeng the #ro bdurdary conditions Caco of Fa Oz Ant Ar dud Caz Cee at FAR Cao * Aa tatu subtracting gives Cao tA ka Rt 1s Cas bea AE Now vy = ~@dey =D At zo4: =--Dlac dr = he R 2R & R Ln hy, Ss? Zi freer @ thy negative