Excess enthalpies and excess volumes of 1-nitropropane +, and 2-nitro-propane +, each of several non-polar liquids |
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Authors: | Kenneth N. Marsh Warren A. Allan Alan E. Richards |
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Affiliation: | Department of Chemistry, University of New England, Armidale, N.S.W., Australia 2351 |
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Abstract: | Excess molar enthalpies HmE and excess molar volumes VmE have been measured for xC3H7NO2 + (1 ? x)c-C6H12 at 298.15 and 318.15 K; +(1 ? x)CCl4 at 298.15 and 318.15 K; +(1 ? x)C6H6 at 298.15 and 318.15 K; +(1 ? x)C6H14 (VmE only) at 298.15 K; +(1 ? x)p-C6H4(CH3)2 at 298.15 K; and for xCH3CH(NO2)CH3 + (1 ? x)c-C6H12 at 298.15 and 318.15 K; +(1 ? x)CCl4 at 298.15 and 318.15 K; +(1 ? x)C6H6 at 298.15 K; +(1 ? x)C6H14 at 298.15 K; +(1 ? x)(CH3)2CHCH(CH3)2 for HmE at 318.15 K and for VmE at 298.15 K; and +(1 ? x)C16H34 at 298.15 K. The HmE′s were determined with an isothermal dilution calorimeter and the VmE′s with a continuous-dilution dilatometer. Particular attention was paid to the region dilute in nitroalkane. In general HmE is large and positive for (a nitropropane + an alkane), less positive for (a nitropropane + tetrachloromethane), and small for (a nitropropane + benzene) and for (a nitropropane + 1,4-dimethylbenzene). The mixture with hexadecane shows phase separation. VmE is large and positive for (1-nitropropane + cyclohexane), less positive for (1-nitropropane + hexane), and S-shaped for (1-nitropropane + tetrachloromethane) with negative values in the 1-nitropropane-rich region. For (1-nitropropane + benzene) and for (1-nitropropane + 1,4-dimethylbenzene) VmE is negative. For mixtures with 2-nitropropane the results are similar except that for benzene VmE is S-shaped with positive values in the 2-nitropropane-rich region. |
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Keywords: | Author to whom correspondence should be addressed. Present address: Thermodynamics Research Center Texas A and M University College Station Texas 77843 U.S.A. |
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