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P A G Ohare - One of the best experts on this subject based on the ideXlab platform.
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fluorine combusTion calorimeTric deTerminaTions of The sTandard molar enThalpy changes for The formaTion of sise2 cr sise1 94 cr and sise1 94 viT and for The TransiTion sise1 94 viT sise1 94 cr aT The TemperaTure T 298 15 k implicaTions of The resulT
The Journal of Chemical Thermodynamics, 1994Co-Authors: Iwona Tomaszkiewicz, S Susman, K J Volin, P A G OhareAbstract:AbsTracT Fluorine-bomb calorimeTry was used To deTermine The sTandard massic energies of combusTion Δcuo of The silicon selenides SiSe2(cr), SiSe1.94(cr), and SiSe1.94(viT), according To The combusTion reacTion: SiSev(s) + (2 + 3v)F2(g) = SiF4(g) + vSeF6(g). The following addiTional resulTs were derived for The sTandard molar energy of combusTion ΔcUom; The sTandard molar enThalpy of combusTion ΔcHom; and The sTandard molar enThalpy of formaTion ΔfHom, all aT The TemperaTure T = 298.15 K and for The sTandard pressure po = 101.325 kPa See Table. STandard Thermodynamic properTies of The gas SiSe(g) were calculaTed by means of The convenTional formulae of sTaTisTical mechanics. On The basis of The Thermochemical quanTiTies given above, The sTandard molar enThalpy of The TransiTion: SiSe1.94(viT) = SiSe1.94(cr) is ΔTrsHom = -(6.5 ± 2.2) kJ·mol-1 aT T = 291.15 K. (All uncerTainTies in This absTracT correspond To Twice The sTandard deviaTion of The mean.) ImplicaTions of The Thermochemical quanTiTies for The enThalpies of dissociaTion Dom (SiX) and Dom (X-SiX), where X denoTes O, S, or Te.
K. Chylinski - One of the best experts on this subject based on the ideXlab platform.
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IsoThermal compressibiliTies and excess molar volumes of {xCH3C(CH3)2CH2CH(CH3)CH3 + (1 - x)cis-C10H18} aT The TemperaTure T = 298.15 K; and of {xCH3C(CH3)2CH2CH(CH3)CH3 + (1 - x)Trans-C10H18} aT T = 298.15 K and 318.15 K
The Journal of Chemical Thermodynamics, 1994Co-Authors: K. ChylinskiAbstract:AbsTracT IsoThermal compressibiliTies of (2,2,4-TrimeThylpenTane + cis -decalin) aT The TemperaTure T = 298.15 K, and of (2,2,4-TrimeThylpenTane + Trans -decalin) aT T = 298.15 K and 318.15 K were obTained from ( p, V, T ) measuremenTs in a glass piezomeTer in The pressure range 0.1 MPa To 5 MPa. The excess isoThermal compressibiliTies compuTed from The parameTers of an equaTion describing The observed V ( p ) are also reporTed. AddiTionally excess molar volumes for The same mixTures aT The same TemperaTures were measured using a successive-diluTion dilaTomeTer. Generally boTh excess quanTiTies κ E T and V E m are sTrongly negaTive for The mixTures sTudied and become more negaTive wiTh rise of TemperaTure.
Iwona Tomaszkiewicz - One of the best experts on this subject based on the ideXlab platform.
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fluorine combusTion calorimeTric deTerminaTions of The sTandard molar enThalpy changes for The formaTion of sise2 cr sise1 94 cr and sise1 94 viT and for The TransiTion sise1 94 viT sise1 94 cr aT The TemperaTure T 298 15 k implicaTions of The resulT
The Journal of Chemical Thermodynamics, 1994Co-Authors: Iwona Tomaszkiewicz, S Susman, K J Volin, P A G OhareAbstract:AbsTracT Fluorine-bomb calorimeTry was used To deTermine The sTandard massic energies of combusTion Δcuo of The silicon selenides SiSe2(cr), SiSe1.94(cr), and SiSe1.94(viT), according To The combusTion reacTion: SiSev(s) + (2 + 3v)F2(g) = SiF4(g) + vSeF6(g). The following addiTional resulTs were derived for The sTandard molar energy of combusTion ΔcUom; The sTandard molar enThalpy of combusTion ΔcHom; and The sTandard molar enThalpy of formaTion ΔfHom, all aT The TemperaTure T = 298.15 K and for The sTandard pressure po = 101.325 kPa See Table. STandard Thermodynamic properTies of The gas SiSe(g) were calculaTed by means of The convenTional formulae of sTaTisTical mechanics. On The basis of The Thermochemical quanTiTies given above, The sTandard molar enThalpy of The TransiTion: SiSe1.94(viT) = SiSe1.94(cr) is ΔTrsHom = -(6.5 ± 2.2) kJ·mol-1 aT T = 291.15 K. (All uncerTainTies in This absTracT correspond To Twice The sTandard deviaTion of The mean.) ImplicaTions of The Thermochemical quanTiTies for The enThalpies of dissociaTion Dom (SiX) and Dom (X-SiX), where X denoTes O, S, or Te.
Pooran Singh - One of the best experts on this subject based on the ideXlab platform.
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TheoreTical analyses of superconducTiviTy in iron based superconducTor Ba1−xKxFe2As2
Momona Ethiopian Journal of Science, 2017Co-Authors: Tadesse Desta, Gebregziabher Kahsay, Pooran SinghAbstract:This paper focuses on The TheoreTical analysis of superconducTiviTy in iron based superconducTor Ba 1−x K x Fe 2 As 2 . AfTer reviewing The currenT findings on This sysTem, we suggesT ThaT phononexciTon combined mechanism gives a righT order of superconducTing TransiTion TemperaTure (T C ) for Ba 1−x K x Fe 2 As 2 . By developing a model HamilTonian for The sysTem under consideraTion, using double Time TemperaTure dependenT Green’s funcTion formalism and a suiTable decoupling approximaTion Technique, we have analyzed TheoreTically The superconducTiviTy of iron-based superconducTor Ba 1−x K x Fe 2 As 2 . FurThermore, by using The experimenTal and plausible TheoreTical values of The parameTers in The obTained expressions, phase diagrams of superconducTing TransiTion TemperaTure (T C ) versus elecTron coupling consTanT (λe) and superconducTing TransiTion TemperaTure (T C ) versus superconducTing gap parameTer (Δhave been ploTTed. Our findings demonsTraTe ThaT, as The elecTron coupling consTanT (λe) increases The superconducTing TransiTion TemperaTure (T C ) increases and vice versa and also as The TemperaTure increases The superconducTing order parameTer decreases and vanishes aT The TransiTion TemperaTure (T C ) for Ba 1−x K x Fe 2 As 2 . Our findings are in a broad agreemenT wiTh The experimenTal observaTions. Keywords : Iron based SuperconducTors, Green’s FuncTion formalism, SuperconducTing order parameTer, Ba 1−x K x Fe 2 As 2 .
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CoexisTence of SuperconducTiviTy and Spin DensiTy Wave (SDW) in FerropnicTide Ba_1−x K_ x Fe_2As_2
Journal of Superconductivity and Novel Magnetism, 2016Co-Authors: Tadesse Desta, Gebregziabher Kahsay, Pooran SinghAbstract:This work focuses on The TheoreTical invesTigaTion of The coexisTence of superconducTiviTy and spin densiTy wave (SDW) in ferropnicTide Ba_1− x K_ x Fe_2As_2. By developing a model HamilTonian for The sysTem and by using quanTum field Theory Green’s funcTion formalism, we have obTained maThemaTical expressions for superconducTing TransiTion TemperaTure ( T _C), spin densiTy wave TransiTion TemperaTure ( T _sdw), superconducTiviTy order parameTer (Δ_Sc), and spin densiTy wave order parameTer (Δ_sdw). By employing The experimenTal and TheoreTical values of The parameTers in The obTained expressions, phase diagrams of superconducTing TransiTion TemperaTure ( T _C) versus superconducTing order parameTer (Δ_Sc) and spin densiTy wave TransiTion TemperaTure ( T _sdw), versus spin densiTy wave order parameTer (Δ_sdw) have been ploTTed. By combining The Two phase diagrams, we have demonsTraTed The possible coexisTence of superconducTiviTy and spin densiTy wave (SDW) in ferropnicTide Ba_1− x K_ x Fe_2As_2.
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CoexisTence of SuperconducTiviTy and Spin DensiTy Wave (SDW) in FerropnicTide Ba1−xKxFe2As2
Journal of Superconductivity and Novel Magnetism, 2016Co-Authors: Tadesse Desta, Gebregziabher Kahsay, Pooran SinghAbstract:This work focuses on The TheoreTical invesTigaTion of The coexisTence of superconducTiviTy and spin densiTy wave (SDW) in ferropnicTide Ba1−x K x Fe2As2. By developing a model HamilTonian for The sysTem and by using quanTum field Theory Green’s funcTion formalism, we have obTained maThemaTical expressions for superconducTing TransiTion TemperaTure (T C), spin densiTy wave TransiTion TemperaTure (T sdw), superconducTiviTy order parameTer (ΔSc), and spin densiTy wave order parameTer (Δsdw). By employing The experimenTal and TheoreTical values of The parameTers in The obTained expressions, phase diagrams of superconducTing TransiTion TemperaTure (T C) versus superconducTing order parameTer (ΔSc) and spin densiTy wave TransiTion TemperaTure (T sdw), versus spin densiTy wave order parameTer (Δsdw) have been ploTTed. By combining The Two phase diagrams, we have demonsTraTed The possible coexisTence of superconducTiviTy and spin densiTy wave (SDW) in ferropnicTide Ba1−x K x Fe2As2.
S Susman - One of the best experts on this subject based on the ideXlab platform.
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fluorine combusTion calorimeTric deTerminaTions of The sTandard molar enThalpy changes for The formaTion of sise2 cr sise1 94 cr and sise1 94 viT and for The TransiTion sise1 94 viT sise1 94 cr aT The TemperaTure T 298 15 k implicaTions of The resulT
The Journal of Chemical Thermodynamics, 1994Co-Authors: Iwona Tomaszkiewicz, S Susman, K J Volin, P A G OhareAbstract:AbsTracT Fluorine-bomb calorimeTry was used To deTermine The sTandard massic energies of combusTion Δcuo of The silicon selenides SiSe2(cr), SiSe1.94(cr), and SiSe1.94(viT), according To The combusTion reacTion: SiSev(s) + (2 + 3v)F2(g) = SiF4(g) + vSeF6(g). The following addiTional resulTs were derived for The sTandard molar energy of combusTion ΔcUom; The sTandard molar enThalpy of combusTion ΔcHom; and The sTandard molar enThalpy of formaTion ΔfHom, all aT The TemperaTure T = 298.15 K and for The sTandard pressure po = 101.325 kPa See Table. STandard Thermodynamic properTies of The gas SiSe(g) were calculaTed by means of The convenTional formulae of sTaTisTical mechanics. On The basis of The Thermochemical quanTiTies given above, The sTandard molar enThalpy of The TransiTion: SiSe1.94(viT) = SiSe1.94(cr) is ΔTrsHom = -(6.5 ± 2.2) kJ·mol-1 aT T = 291.15 K. (All uncerTainTies in This absTracT correspond To Twice The sTandard deviaTion of The mean.) ImplicaTions of The Thermochemical quanTiTies for The enThalpies of dissociaTion Dom (SiX) and Dom (X-SiX), where X denoTes O, S, or Te.
