共查询到18条相似文献,搜索用时 55 毫秒
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化学平衡是物理化学课程的重要教学内容,本文对化学平衡态的存在性、唯一性与稳定性问题进行了系统与全面的讨论,以供同行在化学平衡教学中参考. 相似文献
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化学反应速度和化学平衡 总被引:2,自引:0,他引:2
化学反应速度和化学平衡是学习无机化学的基础理论之一。掌握了这两章的内容,既有实际意义,也为后面将要学习的电离平衡、氧化还原平衡、沉淀平衡和络合(配合)平衡等内容打下了基础。 相似文献
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在中学化学影响化学平衡条件的教学中,依据中学化学教材介绍的化学平衡常数表达式,来分析和证明影响化学平衡移动的因素,这是一种新教法。此教法能使学生快速明白和快速判断化学平衡移动的方向。同时,还能使学生进一步理解化学平衡常数的意义。 相似文献
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交流示波极谱图重现性的研究 总被引:5,自引:2,他引:5
本文用集成运放为主要元件改进了交流示波极谱的实验线路,并用该线路在严格控制实验条件的情况下,对交流示波极谱图的重现性进行了系统的研究。实验表明,交流示波极谱图的重现性良好,可将其用于有机化合物及有机药物的定性鉴定。 相似文献
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化学反应速度和化学平衡是化工生产和科学研究中两个非常重要,并且彼此密切相关的问题,又是化学学科中重要的基本理论。而温度对化学反应速度和化学平衡的影响尤为重要和复杂。 相似文献
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液体混合物和液体溶液中的化学平衡 总被引:2,自引:1,他引:2
液体混合物和液体溶液中的化学平衡刘天和,周恩绚(北京理工大学六系,100081)(北京航空航天大学,100083)在液体混合物和液体溶液中的化学平衡所涉及到的基本概念和定义,ISO国际标准和我国国家标准 ̄[1,2]都作了明确的说明和规定。这些标准理顺... 相似文献
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Sidney W. Benson 《Angewandte Chemie (International ed. in English)》1978,17(11):812-819
Electrostatic models of the chemical bond are based on the Virial Theorem and hold promise for providing a reliable and accurate method for predicting heats of formation of molecules and free radicals. The Principle of Alternating Polarity which states that those compounds are most stable in which atoms of opposite polarity are bonded is shown to be quantitatively described by electrostatic models. Current fixed partial-charge models account for ΔH of hydrocarbon molecules and radicals. With inclusion of polarization effects, whose energies are small, they also account for the dipole moments in hydrocarbons. A brief account is given of a more general model with significant polarization interaction which is under development and which appears to be able to account for both ΔH and dipole moments of polar molecules. 相似文献
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M. V. Rusalov 《Russian Journal of General Chemistry》2005,75(3):351-358
A mathematical model describing series of experimental absorption and fluorescence spectra of multicomponent systems via equilibrium and photostationary concentrations of components of the systems was constructed. With photostationary concentrations, it is possible to take into account changes in the fluorescence spectra resulting from photochemical reactions. Ther unknown equilibrium and kinetic parameters of the model and also the spectra of pure components are found from experimental data by the nonlinear least-squares method. A software for the model was developed, and its applicability to the determination of the composition of multicomponent systems, resolution of the spectra of pure components, and determination of equilibrium and kinetic constants was demonstrated.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 3, 2005, pp. 386–394.Original Russian Text Copyright © 2005 by Rusalov. 相似文献
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Ba-K-Bi-O (BKBO)超导体的导电性和超导性各向同性,相干长度长,制备温度低,因此它有良好的应用前景.但在BKBO超导器件走向实用化时,还必须了解它在环境介质中的化学稳定性,以便采取相应的保护措施.本文目的就是研究BKBO在各种介质中的稳定性及其作用机理.用电化学法在BKBO膜上制成了聚毗咯((PPy)和聚唾吩((PTh)膜,为BKBO超导器件的保护提供了新思路. 相似文献