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Figures 1, 2 and 3 further illustrate the temperature dependence of the phase diagram for the ternary sodium 3-nitrobenzenesulphonate + sodium 4-nitrobenzenesulphonate + water system. When the temperature increases from (283.15 to 323.15) K, the solubility of sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate in water increase significantly, and the invariant point moves upward. The phase diagrams at 283.15 K is similar with that at 303.15 K, but different with that at 323.15 K, at which temperature the adduct A formed in the ternary system.
On the basis of data collected in Tables 1, 2 and 3, relationship between the density of the equilibrium liquid phase and the sodium 4-nitrobenzenesulphonate concentration values expressed in mass fraction (Figures 4, 5 and 6) are found. The density of equilibrium liquid phase depends on total content of sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate. Figures 4, 5 and 6 illustrate the minimum density point corresponds to the lowest total content of sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate, and vice versa. The inflection point in Figures 4 and 5 correspond to the cosaturated point C1 in Figure 1 and C2 in Figure 2, and the inflection points in Figure 6 correspond to the cosaturated points C3 and C4 in Figure 3.

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-轩影鳶: 金币+8, 翻译EPI+1, ★★★很有帮助 2012-04-22 22:35:32
sltmac: 金币+2 2012-04-24 08:58:58
图1,2,3阐释了基于温度的三元混合物3-硝基苯磺酸钠,对硝基苯磺酸钠和水的相图。当温度从283.15 升高到323.15K时,两种固体在水中的溶解度显著增加,溶点上移。 283.15 K时的相图与303.15K时的相图相似,但是与323.15K时的相图差别较大,因为323.15K时三元体系中出现了A。
基于表1,2,3中的数据,我们发现了液体相的密度与对硝基苯磺酸钠的浓度之间的关系。液体相的密度与两种固体在溶液中的尝试浓度密切相关。表4,5,6阐述了含最少量的3-硝基苯磺酸钠和对硝基苯磺酸钠时的最小密度。表4,5中的拐点与1,2 中的C1和C2相关,表6中的拐点与表3中的C3和C4相关。
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