| Abstract: | The heat capacity of CuFeS2 (chalcopyrite) was measured between 6.3 and 303.5 K. At 298.15 K, Cp,mo and Smo(T) are (95.67??0.14) J??K-1??mol-1 and (124.9??0.2) J??K-1??mol-1, respectively. From a consideration of the results of two sets of equilibrium measurements we conclude that ??fHmo(CuFeS2, cr, 298.15 K) = -(193.6??1.6) kJ??mol-1 and that the recent bomb-calorimetric determination by Johnson and Steele (J. Chem. Thermodynamics 1981, 13, 991) is in error. The standard molar Gibbs free energy of formation of bornite (Cu5FeS4) is -(444.9??2.1) kJ??mol-1 at 748 K. ?? 1985. |
| Genre: | Article |
| ProdID: | 70013096 |
| Citation Author: | Robie, R. A.; Wiggins, L. B.; Barton, Jr. , P. B.; Hemingway, B. S. |
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| Citation End Page: | 488 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Chemical Thermodynamics |
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| Citation Number Of Pages: | 8 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Low-temperature heat capacity and entropy of chalcopyrite (CuFeS2): estimates of the standard molar enthalpy and Gibbs free energy of formation of chalcopyrite and bornite (Cu5FeS4); 1985; Article; Journal; Journal of Chemical Thermodynamics; Robie, R. A.; Wiggins, L. B.; Barton, Jr. , P. B.; Hemingway, B. S. |
| Citation Start Page: | 481 |
| Citation Volume: | 17 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | Low-temperature heat capacity and entropy of chalcopyrite (CuFeS2): estimates of the standard molar enthalpy and Gibbs free energy of formation of chalcopyrite and bornite (Cu5FeS4); 1985; Article; Journal; Journal of Chemical Thermodynamics; Robie, R. A.; Wiggins, L. B.; Barton, Jr. , P. B.; Hemingway, B. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0021-9614(85)90147-8 |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
| Publisher: | Elsevier |
