Heat and Entropy of Hydration of α‐NiSO4·6H2O to NiSO4·7H2O. Their Low‐Temperature Heat Capacities
作者： J. W. Stout , R. C. Archibald , G. E. Brodale , W. F. Giauque
DOI: 10.1063/1.1726478
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摘要: The heat capacities of α‐NiSO4·6H2O and NiSO4·7H2O have been determined over a range 13° to 300°K. These measurements combined with available heat‐capacity data on these hydrates extending 1°K. Heats solution the two give α‐NiSO4·6H2O+H2O(l)=NiSO4·7H2O , ΔH298.15°K=−1836±25 cal/mole. For reaction NiSO4·7H2O=α‐NiSO4·6H2O+H2O(g) at 25°C P(equil.)=21.0 torr, ΔF°=2126 cal/mole, ΔH°=12 356 cal/mole ΔS°=34.31 gibbs/mole. From data, known entropy H2O(g) third law thermodynamics, ΔS°=34.47 gibbs/mole 25°C, in good agreement. Tables CP°, S°, (H°–H0°)/T, (F°–H0°)/T are included.
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sci-hub.se 参考文章(9)
W. F. Giauque, C. J. Egan, Carbon Dioxide. The Heat Capacity and Vapor Pressure of the Solid. The Heat of Sublimation. Thermodynamic and Spectroscopic Values of the Entropy The Journal of Chemical Physics. ,vol. 5, pp. 45- 54 ,(1937) , 10.1063/1.1749929
Investigations on Paramagnetism at Low Temperatures Philosophical Transactions of the Royal Society A. ,vol. 224, pp. 1- 48 ,(1924) , 10.1098/RSTA.1924.0001
J. W. Stout, Wayne B. Hadley, Heat Capacity of α‐NiSO4·6H2O between 1 and 20°K. Electronic Energy Levels of the Ni++ Ion Journal of Chemical Physics. ,vol. 40, pp. 55- 63 ,(1964) , 10.1063/1.1724894
D. G. R. Bonnell, L. W. Burridge, The dissociation pressures of some salt hydrates Transactions of The Faraday Society. ,vol. 31, pp. 473- 478 ,(1935) , 10.1039/TF9353100473
W. F. Giauque, J. W. Stout, The Entropy of Water and the Third Law of Thermodynamics. The Heat Capacity of Ice from 15 to 273°K. Journal of the American Chemical Society. ,vol. 58, pp. 1144- 1144 ,(1936) , 10.1021/JA01298A023
W. F. Giauque, R. C. Archibald, The Entropy of Water from the Third Law of Thermodynamics. The Dissociation Pressure and Calorimetric Heat of the Reaction Mg(OH)2 = MgO + H2O.. The Heat Capacities of Mg(OH)2 and MgO from 20 to 300°K. Journal of the American Chemical Society. ,vol. 59, pp. 561- 569 ,(1937) , 10.1021/JA01282A039
W. F. Giauque, H. L. Johnston, K. K. Kelley, HYDROGEN GAS THERMOMETER COMPARED WITH THE OXYGEN AND HYDROGEN VAPOR-PRESSURE THERMOMETERS BY MEANS OF A COPPER-CONSTANTAN THERMOCOUPLE Journal of the American Chemical Society. ,vol. 49, pp. 2367- 2372 ,(1927) , 10.1021/JA01409A004
J. W. Stout, W. F. Giauque, Magnetism and the Third Law of Thermodynamics. Magnetic Susceptibility, Adiabatic Change of Temperature on Magnetization and Head Capacity of NiSO4. 7H2O1 Journal of the American Chemical Society. ,vol. 63, pp. 714- 722 ,(1941) , 10.1021/JA01848A021
Walter C. Schumb, THE DISSOCIATION PRESSURES OF CERTAIN SALT HYDRATES BY THE GAS-CURRENT SATURATION METHOD Journal of the American Chemical Society. ,vol. 45, pp. 342- 354 ,(1923) , 10.1021/JA01655A011