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| A SIMPLIFIED FORMULA TO CALCULATE HEAT OF FORMATION OF OXYACID SALT AND MINERAL |
| Wen Yuankai;Shao Jun;Wang Sanshan;Chen Dewei University of Science and Technology of China |
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Cite this article:
Wen Yuankai;Shao Jun;Wang Sanshan;Chen Dewei University of Science and Technology of China. A SIMPLIFIED FORMULA TO CALCULATE HEAT OF FORMATION OF OXYACID SALT AND MINERAL. Acta Metall Sin, 1979, 15(1): 98-108.
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Abstract The heat of formation of oxyacid salt, △H_f°.M_mYO_(n+1), may be expressed bysumming up the heat of formation of individual component oxide, △H°_(f[m_mO]) and△H_(f,YO_n) and the heat of reaction evolved in the combination of its componentoxides, H_R, thus: △H_(f.M_nYO_(n+1))=△H_(f,M_mO)+△H_(f,YO_n)+H_R Using the "parameter of formation energy of metallic ion, W_f", previouslysuggested by the authors, the heat of reaction, H_R, may be calculated as:H_R=αW_f+b, where α and b are constants depended upon acidity of oxyacid. A great deal of examples of 205 oxyacid salts, some complex silicate mineralsand a few salts under high temperatures, their heats of formation have been cal-culated by this simplified formula in order to ascertain their heats of formation,the results obtained agree well with experiments. The thermal stability and decomposition temperature, T_d, of oxyacid salts havealso been briefly discussed.
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Received: 18 January 1979
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[1] Rossini, F. D. et al., Selected values of chemical thermodynamic properties, NBS Circ., 1952, 500．
[2] Wagman, D. D. et al., Selected values of chemical thermodynamic properties. Nat. Bur. Stand. (U. S.), Tech. Note, (1965--1975) , 270--1--170--6．
[3] 1974．
[4] Robie, R. A. and Waldbaum, D. R., Thermodynamic properties of minerals and related substances at 298． 15 K (25℃) and one atmosphere (1． 013 bars) pressure and at higher temperature, U. S. Geol. Surv. Bull., (1968) , 1256．
[5] Anderson, H. W. and Bromley, L. A., J. Phys. Chem., 63 (1959) , 1115--1118．
[6] Anderson, H. W., A method for estimating the heat of formation of inorganic compounds USAEC, UCRL-8152, 1958．
[7] Darrell, E. W., Method for estimating the heat of formation and tree energy of formation of inorganic compounds USAEC, UCRL-10397, 1962．
[8] 韩天佑,化学通报,(1966) ,188．
[9] 35 (1961) , 1853--59．
[10] Erdos E., Collect. Czech. Chem. Commun., 27 (1962) , 1428--1437．
[11] Schwitzgebel, K. et al., J. Chem. Eng. Data, 16 (1971) , 418--423．
[12] Le Van M, Bull. Soc. Chim. Fr., 2 (1972) , 579--583．
[13] 温元凯,邵俊,陈德炜,地质科学,3 (1978) , 205．
[14] 1963．
[15] Navrotsky, A., Prog. Solid State Chem., 11 (1976) , 203--264． |
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