COEXISTENCE PHENOMENA IN THE CRITICAL REGION: I. THE GRAVITY EFFECT IN ETHANE FROM LIGHT SCATTERING | Zendy

F. E. Murray | Zendy; S. G. Mason | Zendy

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COEXISTENCE PHENOMENA IN THE CRITICAL REGION: I. THE GRAVITY EFFECT IN ETHANE FROM LIGHT SCATTERING

Author(s) -

F. E. Murray,

S. G. Mason

Publication year - 1952

Publication title -

canadian journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.323

H-Index - 68

eISSN - 1480-3291

pISSN - 0008-4042

DOI - 10.1139/v52-067

Subject(s) - chemistry , scattering , light scattering , condensation , binodal , specific gravity , constant (computer programming) , molecular physics , condensed matter physics , thermodynamics , optics , mineralogy , physics , organic chemistry , phase diagram , phase (matter) , computer science , programming language

A method of measuring density gradients caused by gravitational compression in gases near the critical region is described. Relative light scattering coefficients of ethane in bombs 40 cm. long increase, remain constant, or decrease in the downward direction, depending upon the mean filling density. These observations have been correlated with the variation of scattering coefficient with density, and show that appreciable density gradients exist. These observations are confirmed by parallel studies of condensation, and serve to explain the flat portion of the liquid–vapor coexistence curve found with a carefully purified system.

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