Effective ionic radii and the enthalpies of solvation in liquid ammonia |
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| Affiliation: | 1. Department of Agribusiness and Applied Economics, North Dakota State University, Fargo, ND 58108-6050, USA;2. Transportation & Logistics Program (Logistics and Supply Chain Systems), Upper Great Plains Transportation Institute, North Dakota State University, Fargo, ND 58108-6050, USA;1. Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece;2. Department of Physics, University of Crete, 710 03 Heraklion, Crete, Greece;3. Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece;4. Electrical Engineering Department, School of Applied Technology, Technological and Educational Institute of Crete, 710 04 Heraklion, Crete, Greece;5. Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, P.O. Box 1527, Vassilika Vouton, 711 10 Heraklion, Crete, Greece;1. Department of Dermatology, Tehran University of Medical Sciences, Razi Hospital, Tehran, Iran;2. Department of Otorhinolaryngology-Head and Neck Surgery, Tehran University of Medical Sciences, Amiralam Hospital, Tehran, Iran |
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| Abstract: | The ammoniation enthalpies of gaseous Li+, K+, Rb+, Cs+, Ca2+, Sr2+, Ba2+, Ag2+, Hg2+, Pb2+ relative to Na+, and of Cl−, Br−, and the electron relative to I− are determined by analyzing the data on the heats of solution of salts and metals in liquid ammonia. It is then demonstrated that the relative ammoniation enthalpies of alkali and alkaline earth ions can be obtained from the Born equation if an effective radius which is 0·61 Å greater than the crystalline radius is assumed for each ion. Finally the absolute ammoniation enthalpies of the above mentioned ions and the gaseous electron are evaluated. |
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