Correction - Estimation of Setchenow Constants for ... - ACS Publications

270

Ind. Eng. Chem. Fundarn., Vol. 23, No. 2, 1984

CORRECTION Estimation of Setchenow Constants for Nonpolar Gases in Common Salts a t Moderate Temperatures, E. M. Pawlikowski and J. M. Prausnitz, Ind. Eng. Chern. Fundam. 1983, 22, 86. There are some errors in the article which were kindly called to our attention by J. A. Hugill of Shell Research, Amsterdam. Due to faulty algebra, some of the numbers in Tables I11 and V are not correct. Revised tables are given here. Table 111. Salting-Out Parameters for Individual Ions asi, kgimol

ion i

OHK' c1Na' Li NH,' Br-

104bsir kg/(mol K )

0

0.114 0.049 0.129 0.115 0.074 -0.042 0.068 -0.043 0.260 0.187 0.070 0.039

+

H' NO Ca'+ Ba2+

so.,> -

1-

0 5.01 0.99 2.57 2.32 3.61 -0.95 -0.875 --3.97 4.97 6.44 4.88 --3.70

Table V. Temperature Dependence of Saltingout Constants for Individual Ions ion

i

OHK' C1Li' 1-

Na'

ali, 102a2i, kgimol kg/(mol K ) 0 0.0679 0.0182 0.116 0.160 0.497

0

0.0155 -0.0225 -0.0004 -0.0667 --0.123

bli, kg/(mol K )

0 1.95 X 1.514 X 2.86 X 10.' -1.038 X 1.14 X 10.'

bzi, kg/(mol KZ)

0 -4.86 -4.75 -1.80 2.24 4.68

X X X X X

10.'

While Table I11 is intended primarily for 1:l electrolytes, we suggest that for 1:2 electrolytes estimates be made using kSMz+,X-)Z = kgMz++ 2kS; An analogous equation is suggested for 2:l electrolytes. In eq 9, temperature T is in kelvins.