njit-etd1961-002 - New Jersey Institute of Technology

16Saturated vapor volumes were calculated usingcompressibility factorsZRTVSV = PMwhere V SV= specific volume of saturated vapor,ml/gmZ = compressibility factor at T°KR = gas law constant = 82.06KT = temperature of gas in °KP = pressure of gas in atm.M = molecular weight of CH2O = 30.03 gm.at 10°C. Z = 0.9318 at Z c = 0.222 and T r = 0.683.9318 82.06 28³.16SV VSV .1 1.iVSV = 228.142 ml/gmThe saturated liquid at -19 ° C. was taken as thereference state= 0 SSL =0HSL SSLThe saturated vapor at -19°C. 16HSV = 5.57 Kcal/g-mole= 21.9 cal/g-mole °KS svThe ideal gas enthalpy and entropy at -19°C. and 1 atm.were calculated as follows³at Tr = 0.613 and Zc = 0.222(H*-H/Tc)=Tc0 . 1947H* HSV = (0.1947)(414.49)H* = 5570 + 80.701 = 5650.701 cal/g-mole(S* - SSV) = 0.2292S* = 21.9 + 0.2292 = 22.1292 cal/g-mole °K