THE ENTROPY OF SOLUTION OF IODINE AT CONSTANT VOLUME

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Journal of Physical Chemistry (U.S.)

DOI:https://doi.org/10.1021/j100832a503· OSTI ID:4145608

Hildebrand, J H

Recent data on the partial molal volume of iodine and the entropy of expansion of solvents are used to calculate the partial molal entropy of solution of solid iodine at constant pressure ( DELTA S/sub p/) and at constant volume ( DELTA S/sub v/). Both DELTA S/sub p/ and DELTA S/sub v/ are plotted vs. -R In x/sub 2/ (x/sub 2/ solubility) for a series of non-interacting and nonpolar solvents at 25 deg C. The slope of the DELTA S/sub v/line is 1.10. not too greatly different from the value of 1.00 expected from theoretical considerations for regular solutions. The intercept of the line extropolated to the -R ln x/sub 2/ axis is 9.0 entropy units for the entropy of fusion of iodine at 25 deg C, not far from the 8.0 value extrapolated from the melting point of iodine and known heat capacities. (D.J.C.)

• Research Organization: Univ. of California, Berkeley
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-012572
• OSTI ID: 4145608
• Journal Information: Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 64; ISSN JPCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ENTROPY
INTERACTIONS
IODINE
MELTING
MELTING POINTS
PRESSURE
SOLUTIONS
SOLVENTS
SPECIFIC HEAT
THERMODYNAMICS