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- W1490299731 abstract "Abstract The product from reaction of lanthanum chloride seven-hydrate with salicylic acid and 8-hydroxyquinoline, La(C7H5O3)2·(C9H6NO), was characterized by IR, elemental analysis, molar conductance, and thermogravimetric analysis. The standard molar enthalpies of solution of [LaCl3·7H2O (s)], [2C7H6O3 (s)], [C9H7NO (s)] and [La(C7H5O3)2·(C9H6NO) (s)] in a mixed solvent of absolute ethyl alcohol, dimethyl formamide (DMF) and perchloric acid were determined by calorimetry to be Δ s H m Θ [LaCl3·7H2O (s), 298.15 K] = −96.45 ± 0.18 kJ mol−1, Δ s H m Θ [2C7H6O3 (s), 298.15 K] = 14.99 ± 0.17 kJ mol−1, Δ s H m Θ [C9H7NO (s), 298.15 K] = −3.86 ± 0.06 kJ mol−1 and Δ s H m Θ [La(C7H5O3)2·(C9H6NO) (s), 298.15 K] = −117.78 ± 0.11 kJ mol−1. The enthalpy change of the reaction (1) LaCl3·7H2O (s) + 2C7H6O3 (s) + C9H7NO (s) = La (C7H5O3)2·(C9H6NO) (s) + 3HCl (g) + 7H2O (l) was determined to be Δ r H m Θ = 91.57 ± 0.34 kJ mol−1. From data in the literature, through Hess’ law, the standard molar enthalpy of formation of La(C7H5O3)2·(C9H7NO) (s) was estimated to be Δ f H m Θ [La(C7H5O3)2·(C9H6NO) (s), 298.15 K] = − 2076.5 ± 3.9 kJ mol−1." @default.
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- W1490299731 date "2007-12-01" @default.
- W1490299731 modified "2023-09-27" @default.
- W1490299731 title "Synthesis, characterization and standard molar enthalpy of formation of Sm(C7H5O3)2·(C9H6NO)" @default.
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- W1490299731 doi "https://doi.org/10.1016/j.tca.2007.10.003" @default.
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