Measurements of (p, ϱ, T) on c-C6H12 and on (0.501 c-C6H12 + 0.499n-C7H16) at pressures up to 100 MPa

doi:10.1016/0021-9614(90)90202-2

The Journal of Chemical Thermodynamics

Volume 22, Issue 3, March 1990, Pages 293-300

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Abstract

Measurements of (p, ϱ, T) have been made on c-C₆H₁₂ and on (0.501c-C₆H₁₂ + 0.499n-C₇H₁₆) as a function of temperature (from 295 to 355 K) and pressures up to 100 MPa by means of a magnetic-suspension method. Excess molar volumes have also been derived and their qualitative behaviour is discussed.

References (16)

S Toscani et al.
J. Chem. Thermodynamics
(1989)
K.D Wisotzki et al.
J. Phys. Chem. Solids
(1982)
T.M Letcher et al.
J. Chem. Thermodynamics
(1979)
A Heintz
Ber. Bunsenges. Phys. Chem.
(1979)
P Jeschke et al.
J. Chem. Thermodynamics
(1978)
T.F Sun et al.
Phys. Chem. Liq.
(1987)
J Jonas et al.
J. Phys. Chem.
(1980)
H.J Parkhurst et al.
J. Chem. Phys.
(1975)
H.J Parkhurst et al.
J. Chem. Phys.
(1975)

There are more references available in the full text version of this article.

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Measurements of (p, ϱ, T) on c-C6H12 and on (0.501 c-C6H12 + 0.499n-C7H16) at pressures up to 100 MPa

Abstract

J. Chem. Thermodynamics

J. Phys. Chem. Solids

J. Chem. Thermodynamics

Ber. Bunsenges. Phys. Chem.

J. Chem. Thermodynamics

Phys. Chem. Liq.

J. Phys. Chem.

J. Chem. Phys.

J. Chem. Phys.

Measurements of (p, ϱ, T) on c-C₆H₁₂ and on (0.501 c-C₆H₁₂ + 0.499n-C₇H₁₆) at pressures up to 100 MPa