| 水+3-甲基吡啶+溴化钠三元溶液临界跨接现象 |
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| 引用本文： | 高学艺,安学勤,王农,马兴科,沈伟国.水+3-甲基吡啶+溴化钠三元溶液临界跨接现象[J].物理化学学报,2006,22(7):888-890. |
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| 作者姓名： | 高学艺 安学勤 王农 马兴科 沈伟国 |
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| 作者单位： | College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China; College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, P. R. China; Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China |
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| 基金项目： | 中国科学院资助项目;教育部科学技术研究项目 |
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| 摘 要： | 采用折射率法在较宽温度范围内研究了溴化钠、3-甲基吡啶和水的临界质量分数分别为0.240、0.192和0.568体系的临界性质, 发现在近临界点临界指数为0.365, 与Fishe重整化值一致. 有效临界指数随着温度逐渐远离临界点, 从0.365下降到0.20左右, 但当排除了“正规项”的影响后, 展现出向平均场理论值0.5单调跨接的行为.
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| 关 键 词： | 电解质溶液 临界现象 临界跨接 共存曲线 折射率 |
| 收稿时间： | 2005-12-19 |
| 修稿时间： | 2006-03-14 |
Critical Crossover Phenomena in Ternary Solutions of Water+3-methylpyridine+Sodium Bromide |
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| GAO Xue-Yi,AN Xue-Qin,WANG Nong,MA Xing-Ke,SHEN Wei-Guo.Critical Crossover Phenomena in Ternary Solutions of Water+3-methylpyridine+Sodium Bromide[J].Acta Physico-Chimica Sinica,2006,22(7):888-890. |
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| Authors: | GAO Xue-Yi AN Xue-Qin WANG Nong MA Xing-Ke SHEN Wei-Guo |
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| Institution: | College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China; College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, P. R. China; Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China |
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| Abstract: | The critical phenomena of water 3-methylpyridine sodium bromide system, with the mass fractions of sodium bromide, 3-methylpyridine, and water being 0.240, 0.192, and 0.568, respectively, have been studied by measuring refractive indexes in two coexisting phases. It was found that the effective critical exponent was 0.365 near the critical point, which is in well agreement with the Fisher renormalization value. As the distance from the critical point increased, the effective critical exponent decreased from 0.365 to 0.20, but it exhibited crossover from Ising to mean-field critical behavior after the regular term was subtracted. |
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| Keywords: | Electrolyte solution Critical phenomena Critical crossover Coexistence curve Refractive index |
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