Thermodynamic properties of metal amides determined by ammonia pressure-composition isotherms
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00028860
ID | 28860 |
file | |
creator |
Hino, Satoshi
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subject | Hydrogen storage materials
Pressure-composition isotherms
Gas-solid reactions
Van't Hoff plot
Heat of formation
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NDC |
Chemistry
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abstract | Thermodynamic properties of Mg(NH2)(2) and LiNH2 were investigated by measurements of NH3 pressure-composition isotherms (PCI). Van't Hoff plot of plateau pressures of PCI for decomposition of Mg(NH2)(2) indicated the standard enthalpy and entropy change of the reactions were Delta H degrees = (120 +/- 11) kJ . mol(-1) (per unit amount of NH3) and Delta S degrees= (182 +/- 19) J . mol(-1) . K-1 for the reaction: Mg(NH2)(2) -> MgNH +NH3, and Delta H degrees= 112 kJ . mol(-1) and Delta S degrees = 157 J . mol(-1) K-1 for the reaction: MgNH -> (1/3)Mg3N2 + (1/3)NH3. PCI measurements for formation of LiNH2 were carried out, and temperature dependence of plateau pressures indicated Delta H degrees = (-108 +/- 15) kJ . mol(-1) and Delta S degrees = (-143 +/- 25) J. mol(-1) . K-1 for the reaction: Li2NH + NH3 -> 2LiNH(2).
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journal title |
Journal of Chemical Thermodynamics
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volume | Volume 42
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issue | Issue 1
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start page | 140
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end page | 143
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date of issued | 2010-01
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publisher | Academic Press LTD
Elsevier Science LTD
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issn | 0021-9614
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ncid | |
publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | author
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rights | Copyright (c) 2009 Elsevier Ltd.
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relation url | |
department |
Institute for Advanced Materials Research
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