Table 5.

The compressibility of some hydrocarbons from Eq. 7 at 0.9 TC of each hydrocarbon

Hydrocarbon	$\begin{array}{c}\sigma \\ ({\mathrm{A}}^{\circ })\\ \end{array}$	$\begin{array}{c}\epsilon \times {10}^2\\ (eV)\\ \end{array}$	$\begin{array}{c}M\\ (g/mol)\\ \end{array}$	$\begin{array}{c}{\chi }_T\\ (at{m}^{-1})\\ \end{array}$
$C{H}_4$	3.780	1.31	16.04	0.0425
$C_2{H}_4$	4.228	1.84	28.05	0.0450
$C_3{H}_6$	4.766	2.34	42.08	0.0794
$C_3{H}_8$	4.934	2.33	44.10	0.0340