. 1973 Jan-Feb;77A(1):133–147. doi: 10.6028/jres.077A.007

Table 6.

Mean normalized second interaction virial coefficients ${\bar{B}}_{a w}$ based on NBS data

Isotherm Temp.	Mean normalized ${\bar{B}}_{a w}$	Standard deviation of single determination		Standard deviation of mean
°C	cm³/mol	cm³/mol	Percent	cm³/mol	Percent
30	−29.245	0.46	1.6	.21	0.7
40	−26.291	.41	1.6	.18	.7
50	−23.595	1.35	5.7	.33	1.4