An Approach to Reaction Thermodynamics through Enthalpies, Entropies, and Free Energies of Atomization
An Approach to Reaction Thermodynamics through Enthalpies, Entropies, and Free Energies of Atomization
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通过焓、熵和原子化自由能研究反应热力学的方法
DOI：
10.1021/ed073p631
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发表时间：
1996
影响因子：
3
通讯作者：
R. Moog
中科院分区：
文献类型：
--
作者：
R. Gillespie;J. Spencer;R. Moog
本文提出了一种用原子化能代替生成能来计算反应能的方法。这使学生能够直接看到反应的热力学性质是由反应物和产物中键强度的差异决定的。这种方法还统一了用于考虑熵，熵和反应自由能的模型，通过参考相同的“概念中间体”计算所有这三个量-完全原子化状态，而不是标准条件下的聚集稳定状态。这个概念--化合物分解成其组成气体原子--不仅可以用来讨论热力学参数，而且可以用来讨论平衡和化学计量。
An alternative to the conventional method of calculating enthalpies of reaction is presented, using enthalpies of atomization in place of enthalpies of formation. This allows the student to see directly that the reaction enthalpies are determined by the difference in bond strengths in the reactants and products. This approach also unifies the model used for considering enthalpies, entropies, and free energies of reaction by calculating all three of these quantities with reference to the same "conceptual intermediate"--the totally atomized state, rather than the stable state of aggregation under standard conditions. This concept--the decomposition of a compound to its constituent gaseous atoms--can be used to discuss not only the thermodynamic parameters but also equilibrium and stoichiometry.