Standard partial molar heat capacities and volumes of aqueous N-methylpiperidine and N-methylpiperidinium chloride from 283 K to 393 K - Institut de Chimie de Clermont-Ferrand Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Thermodynamics Année : 2017

Standard partial molar heat capacities and volumes of aqueous N-methylpiperidine and N-methylpiperidinium chloride from 283 K to 393 K

Résumé

Densities and volumetric heat capacities for dilute solutions of N-methylpiperidine (N-MP, 0.2 mol·kg−1) and N-methylpiperidinium chloride (N-MPH+Cl−, 0.1 mol·kg−1) were measured relative to water at 0.1 MPa using a vibrating-tube densimeter, and at 0.4 MPa using a twin fixed-cell, power-compensation, differential temperature-scanning nano calorimeter, over the temperature ranges 283.15 K ≤ T ≤ 363.15 K and 283.15 K ≤ T ≤ 393.15 K, respectively. The resulting apparent molar volumes, Vϕ, and heat capacities, Cp,ϕ, were corrected for speciation effects using Young’s rule and extrapolated to infinite dilution using the Debye-Hückel limiting law, Yo ≈ Yϕ − AYIs1/2, to yield the standard partial molar properties, Yo, for N-MP(aq) and N-MPH+Cl−(aq). The standard partial molar volumes, Vo, and heat capacities, Cpo, were represented by a semi-empirical function of solvent density and temperature, Yo(ρw,T), the “density” model, which can be used to extrapolate these results, as well as other thermodynamic properties for the ionization of N-methylpiperidine, to higher temperatures.
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Dates et versions

hal-01568939 , version 1 (26-07-2017)

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Christine Mcgregor, Olivia Fandino, Jenny Cox, Karine Ballerat-Busserolles, Peter R. Tremaine. Standard partial molar heat capacities and volumes of aqueous N-methylpiperidine and N-methylpiperidinium chloride from 283 K to 393 K. Journal of Chemical Thermodynamics, 2017, 113, pp.377-387. ⟨10.1016/j.jct.2017.05.033⟩. ⟨hal-01568939⟩
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