Abstract
Abstract (1) An equation of state in analytical form is proposed: (Remark: Graphics omitted.) Values of (2–ε) keep constant over a wide range of pressures of each isotherm. Taking the mean of (2–ε) values at each isotherm, we obtain an equation of state which is more reasonable and accurate than the usual isothermal equation of algebraic form. (2) Tests made with 66 kinds of substances having low dielectric constants prove that values of (2–ε) at critical points are universal to give 1.923±0.008. (3) The following three formulae at the critical point are derived from the new equation in which Vc is expressed in cc./mol. (Remark: Graphics omitted.) The first formula is concordant with ±2.6% average divergence for 66 kinds of low dielectric substances and the two following are also equally concordant with the experimental data.
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