COEXISTENCE PHENOMENA IN THE CRITICAL REGION: III. COMPRESSIBILITY OF ETHYLENE AND XENON FROM LIGHT SCATTERING

Abstract

Turbidity measurements in the region immediately above the critical temperature are used to calculate values of (∂p/∂ν)_T These results show that (∂p/∂ν)_T is a continuously variable function of the density to within 0.02 °C. above the critical temperature. The experiments indicate that there exists no region above T_c throughout which (∂p/∂ν)_T = 0 in ethylene or xenon.