Naslov
Ion-Association Reaction of Rb+ and Br− in 2- Methylpropan-2-ol + Water Mixtures

Autori
Sokol, Vesna ; Tomaš, Renato ; Bošković, Perica

Izvornik
Acta chimica Slovenica (1318-0207) 59 (2012), 4; 920-926

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
rubidium bromide; 2-methylpropan-2-ol + water mixtures; association to ion-pairs; thermodynamic quantities

Sažetak
The molar conductivity of RbBr solutions in 2- methylpropan-2-ol (tert-butanol) + water mixtures at alcohol mass fractions of 0.70, 0.80 and 0.90 was measured at temperatures from 288.15 to 308.15 K at 5 K intervals. The limiting molar conductivity (lambda_o) and the ion-pair formation constant (K_A ) were determined by the Lee-Wheaton conductivity equation. Thermodynamic quantities, Gibbs energy (deltaGo), enthalpy (deltaHo) and entropy (deltaSo), for the ion-association reaction were derived from the temperature dependence of K_A ; the activation energy of the ionic movement (deltaH*) was derived from the temperature dependence of lambda_o. These values were compared with those obtained earlier for HBr and NaBr in the same mixtures

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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