The enthalpy of precipitation of univalent cations with tetraphenylborate by titration calorimetry

Peter W. Carr

doi:10.1016/0040-6031(71)80020-5

The enthalpy of precipitation of univalent cations with tetraphenylborate by titration calorimetry

Peter W. Carr

Chemistry (Twin Cities)

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Abstract

The enthalpy of precipitation of six common univalent cations with the tetraphenylborate anion has been measured at 25.0°C. Reaction entropies range from -8.24kcal/mole for ammonium to -19.7 kcal/mole for silver(I). The entropy of reaction was computed from the above measurements and the corresponding Gibbs free energy changes. A linear relationship exists between ΔF°′ and ΔH°′. The entropy of precipitation of ammonium ions was +5.0 e.u., an unusually large positive value.

Original language	English (US)
Pages (from-to)	505-511
Number of pages	7
Journal	Thermochimica Acta
Volume	2
Issue number	6
DOIs	https://doi.org/10.1016/0040-6031(71)80020-5
State	Published - Sep 1971

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AB - The enthalpy of precipitation of six common univalent cations with the tetraphenylborate anion has been measured at 25.0°C. Reaction entropies range from -8.24kcal/mole for ammonium to -19.7 kcal/mole for silver(I). The entropy of reaction was computed from the above measurements and the corresponding Gibbs free energy changes. A linear relationship exists between ΔF°′ and ΔH°′. The entropy of precipitation of ammonium ions was +5.0 e.u., an unusually large positive value.

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The enthalpy of precipitation of univalent cations with tetraphenylborate by titration calorimetry

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