Determination of the standard gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2

Dong Joon Min, N. Sano

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The standard Gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2 were determined by a chemical equilibration technique yielding the following results: 3Ca(1)+2As(1)=Ca3As2 (s) ΔG°=-723,800+172.8 T (±23,700)(J/mol) 1273 to 1573 K 3Ca(1)+2Sb(1)=Ca3Sb2(s) ΔG°=-726,300+159.3 T(±24,600) (J/mol) 1273 to 1573K 3Ca(1)+2Bi(1)=Ca3Bi2(s) ΔG°=-696,400+195.6T(±23,200) (J/mol) 1148 to 1323 K The thermodynamic data for removal of arsenic, antimony, and bismuth by other experimental investigations were discussed in terms of the activity coefficients of these compounds in slags. The stabilities of these compounds were also discussed by using the critical oxygen partial pressures calculated from the above equations.

Original languageEnglish
Pages (from-to)863-870
Number of pages8
JournalMetallurgical Transactions B
Volume20
Issue number6
DOIs
Publication statusPublished - 1989 Dec 1

Fingerprint

Antimony
Bismuth
slags
Activity coefficients
Arsenic
energy of formation
Gibbs free energy
antimony
arsenic
Partial pressure
Slags
bismuth
partial pressure
Thermodynamics
Oxygen
thermodynamics
oxygen
coefficients

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "The standard Gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2 were determined by a chemical equilibration technique yielding the following results: 3Ca(1)+2As(1)=Ca3As2 (s) ΔG°=-723,800+172.8 T (±23,700)(J/mol) 1273 to 1573 K 3Ca(1)+2Sb(1)=Ca3Sb2(s) ΔG°=-726,300+159.3 T(±24,600) (J/mol) 1273 to 1573K 3Ca(1)+2Bi(1)=Ca3Bi2(s) ΔG°=-696,400+195.6T(±23,200) (J/mol) 1148 to 1323 K The thermodynamic data for removal of arsenic, antimony, and bismuth by other experimental investigations were discussed in terms of the activity coefficients of these compounds in slags. The stabilities of these compounds were also discussed by using the critical oxygen partial pressures calculated from the above equations.",
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Determination of the standard gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2. / Min, Dong Joon; Sano, N.

In: Metallurgical Transactions B, Vol. 20, No. 6, 01.12.1989, p. 863-870.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Determination of the standard gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2

AU - Min, Dong Joon

AU - Sano, N.

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N2 - The standard Gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2 were determined by a chemical equilibration technique yielding the following results: 3Ca(1)+2As(1)=Ca3As2 (s) ΔG°=-723,800+172.8 T (±23,700)(J/mol) 1273 to 1573 K 3Ca(1)+2Sb(1)=Ca3Sb2(s) ΔG°=-726,300+159.3 T(±24,600) (J/mol) 1273 to 1573K 3Ca(1)+2Bi(1)=Ca3Bi2(s) ΔG°=-696,400+195.6T(±23,200) (J/mol) 1148 to 1323 K The thermodynamic data for removal of arsenic, antimony, and bismuth by other experimental investigations were discussed in terms of the activity coefficients of these compounds in slags. The stabilities of these compounds were also discussed by using the critical oxygen partial pressures calculated from the above equations.

AB - The standard Gibbs energies of formation of Ca3As2, Ca3Sb2, and Ca3Bi2 were determined by a chemical equilibration technique yielding the following results: 3Ca(1)+2As(1)=Ca3As2 (s) ΔG°=-723,800+172.8 T (±23,700)(J/mol) 1273 to 1573 K 3Ca(1)+2Sb(1)=Ca3Sb2(s) ΔG°=-726,300+159.3 T(±24,600) (J/mol) 1273 to 1573K 3Ca(1)+2Bi(1)=Ca3Bi2(s) ΔG°=-696,400+195.6T(±23,200) (J/mol) 1148 to 1323 K The thermodynamic data for removal of arsenic, antimony, and bismuth by other experimental investigations were discussed in terms of the activity coefficients of these compounds in slags. The stabilities of these compounds were also discussed by using the critical oxygen partial pressures calculated from the above equations.

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