Deuterium isotope differences in 2-propanone, (CH3)2CO/(CD3)2CO: a high-pressure sound-speed, density, and heat capacities study

Thermophysical and thermodynamic properties of ionic liquids over an extended pressure range: [bmim][NTf2] and [hmim][NTf2]

“…It should be noted that while in the first case one witnesses density changes upon different alkyl substitutions within the same ''cationÕs family'', in the second case, the anions belong to distinct chemical species. The comparison with some literature data [16] 6 ]. However, this change in density is not accompanied by a similar effect on a p and j T .…”

“…Examples of very recent reviews and systematic studies can be found, for instance, in references [1][2][3][4] and references therein. They show that some studies are still directed to compounds such as [C n min][PF 6 ] or [C n min] [BF 4 ], that, despite their historical and fundamental importance, are known to easily produce HF and other aggressive chemicals at moderate and high temperatures. We have thus chosen to embark on the study of thermophysical and thermodynamic properties of a possibly cleaner alternative, namely the series containing the popular cation 1-C n -3-methylimidazolium combined with the anion bis(trifluoro methylsulfonyl)amide, [N{SO 2 (CF 3 )} 2 ] À .…”

“…One possible method for deriving a wealth of thermodynamic properties consists in the measurement of the whole (p, q, T) and (p, u, T) surfaces in order to obtain by differentiation the derived properties of the investigated compound. This method has proven useful, for instance, in the calculation of derived properties of protonated and deuterated acetone [5,6]. Nonetheless, commonly accepted as a more reliable method for deriving thermodynamic properties from speed of sound data is that which allows, by integration, the calculation of (p, q, T) and (p C p , T) surfaces from merely one isobar of both density and isobaric heat capacity [7][8][9][10].…”

Deuterium isotope effect on molar heat capacities and apparent molar heat capacities in dilute aqueous solutions: A multi-channel heat-flow microcalorimeter study

“…Indeed, deuterium isotope effects on several physico-chemical properties have been previously reported and discussed [5][6][7][8][9][10][11][12][13][14][15][16]. Depending on the nature of the physico-chemical properties, deuterium isotope effects can be quite significant to nearly negligible.…”

“…With respect to the molar heat capacity, there have been a few reports concerning deuterium isotope effects, and this effect have been shown to be quite large ($10%) [5,7,11,12]. Therefore, it would be useful to extend such studies, to systematic measurements on several substances, with various extents of deuterium substitution.…”