Partial molal entropy and heat capacity of the aqueous thorium(IV) ion. Thermochemistry of thorium nitrate pentahydrate

Journal Article · Thu Jul 01 04:00:00 EDT 1976 · J. Chem. Eng. Data; (United States)

DOI:https://doi.org/10.1021/je60070a028· OSTI ID:7156609

Morss, L R; McCue, M C

Th(NO/sub 3/)/sub 4/.5H/sub 2/O(c) was prepared in high purity and its enthalpy of solution was measured in 0.01 M HClO/sub 4/ at 15, 25, and 35/sup 0/C, using a calorimeter sensitive to 5 x 10/sup -6/K. These measurements are combined with recent literature data to derive anti S/sup 0/(Th/sup 4 +/, aq) = -424 +- 4 J mol/sup -1/ K/sup -1/, anti C/sup 0//sub p2/(Th/sup 4 +/, aq) = -1 +- 11 J mol/sup -1/ K/sup -1/, and ..delta..H/sup 0//sub f/(Th(NO/sub 3/)/sub 4/.5H/sub 2/O, c) = -3009 +- 4 kJ mol/sup -1/ at 298.15/sup 0/K. Anti S/sup 0/ and anti C/sup 0//sub p2/ are interpreted by comparison with other monatomic ions, using appropriate semiempirical equations.

• Research Organization: Rutgers--The State Univ. of New Jersey, New Brunswick
• OSTI ID: 7156609
• Journal Information: J. Chem. Eng. Data; (United States), Journal Name: J. Chem. Eng. Data; (United States) Vol. 21:3; ISSN JCEAA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ENTHALPY
ENTROPY
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SOLUTION HEAT
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
THORIUM COMPOUNDS
THORIUM NITRATES