Published February 10, 2009 | Version v1
Journal article Metadata-only

Synthesis, characterization and thermodynamic properties of NaCs[B4O5(OH)4].4H2O

Creators

  • 1. Institute of Science and Technology, Henan Normal University, Xinxiang 453007 (China)
  • 2. College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007 (China)
  • 3. Institute of Applied Chemistry, Shaanxi Normal University, Xi'an 710069 (China)
  • 4. Xi'an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi'an 710043 (China)

Description

The crystalline form of a new tetraborate, NaCs[B4O5(OH)4].4H2O was synthesized and characterized. The enthalpies of solution of NaCs[B4O5(OH)4].4H2O in approximately 1 mol dm-3 HCl(aq) and of CsCl in aqueous (HCl + H3BO3 + NaCl) were determined. From these results and the enthalpy of solution of H3BO3 in approximately 1 mol dm-3 HCl(aq), the enthalpy of solution of NaCl(s) in aqueous (HCl + H3BO3) and the standard molar enthalpies of formation of NaCl(s), CsCl(s), H3BO3(s) and H2O(l), the standard molar enthalpy of formation for NaCs[B4O5(OH)4].4H2O as being -(5140.55 ± 1.94) kJ mol-1. The standard molar entropy of formation of NaCs[B4O5(OH)4].4H2O was calculated from the thermodynamic relation with the standard molar Gibbs free energy of formation of NaCs[B4O5(OH)4].4H2O computed from a group contribution method

Availability note (English)

Available from http://dx.doi.org/10.1016/j.tca.2008.11.003

Additional details

Identifiers

DOI
10.1016/j.tca.2008.11.003;
PII
S0040-6031(08)00380-8;

Publishing Information

Journal Title
Thermochimica Acta
Journal Volume
483
Journal Issue
1-2
Journal Page Range
p. 70-72
ISSN
0040-6031
CODEN
THACAS

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40083329
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BORATES; BORIC ACID; CALORIMETRY; CESIUM CHLORIDES; CESIUM COMPOUNDS; ENTROPY; FORMATION FREE ENTHALPY; FORMATION HEAT; HYDROCHLORIC ACID; SODIUM CHLORIDES; SODIUM COMPOUNDS; SOLUTION HEAT; SYNTHESIS
Descriptors DEC
ALKALI METAL COMPOUNDS; BORON COMPOUNDS; CESIUM COMPOUNDS; CHLORIDES; CHLORINE COMPOUNDS; ENERGY; ENTHALPY; FREE ENTHALPY; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTION HEAT; SODIUM COMPOUNDS; THERMODYNAMIC PROPERTIES

Optional Information

Copyright
Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.