Published October 1989 | Version v1
Journal article Metadata-only

Standard molar enthalpy of formation of neodymium hydroxide

Creators

  • 1. Argonne National Lab., IL (USA)
  • 2. Yale Univ., New Haven, CT (USA). Dept. of Applied Physics

Description

The enthalpies of solution of Nd(OH)3 and of Nd2O3 have been measured in 6.00 mol·dm-3 HCl(aq) at 298.15 and at 308.15 K. From these measurements ΔfHm0 {Nd(OH)3, s, 298.15 K} has been calculated to be -(1403.7±1.0) kJ·mol-1. When combined with Sm0{Nd(OH)3, s, 298.15 K}, the molar Gibbs free energy of formation ΔfGm0{Nd(OH)3 s, 298.15 K} is calculated to be -(1270.9±1.1) kJ·mol-1 and the standard solubility-product constant for Nd(OH)3 is calculated to be 5 x 10-23 or pKsp0 = (22.3±0.7). (author)

Additional details

Publishing Information

Journal Title
Journal of Chemical Thermodynamics
Journal Volume
21
Journal Issue
10
Series
J. Chem. Thermodyn.
Journal Page Range
1079-1083
ISSN
0021-9614
CODEN
JCTDA

INIS

Country of Publication
United Kingdom
Country of Input or Organization
United Kingdom
INIS RN
21030549
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
FORMATION FREE ENTHALPY; FORMATION HEAT; MEDIUM TEMPERATURE; NEODYMIUM HYDROXIDES; PH VALUE; SOLUBILITY
Descriptors DEC
ENERGY; ENTHALPY; FREE ENTHALPY; HYDROGEN COMPOUNDS; HYDROXIDES; NEODYMIUM COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; REACTION HEAT; THERMODYNAMIC PROPERTIES

Optional Information

Contract/Grant/Project number
Contract W-31-109-ENG-38; DMR-8216222