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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Enthalpy of Formation of N2H4 (Hydrazine) Revisited
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Enthalpy of Formation of N2H4 (Hydrazine) Revisited

机译：重新审视N2H4（肼）形成的焓

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摘要

In order to address the accuracy of the long-standing experimental enthalpy of formation of gas-phase hydrazine, fully confirmed in earlier versions of Active Thermochemical Tables (ATcT), the provenance of that value is re-examined in light of new high-end calculations of the Feller-Peterson-Dixon (FPD) variety. An overly optimistic determination of the vaporization enthalpy of hydrazine, which created an unrealistically strong connection between the gas phase thermochemistry and the calorimetric results defining the thermochemistry of liquid hydrazine, was identified as the probable culprit. The new enthalpy of formation of gas-phase hydrazine, based on balancing all available knowledge, was determined to be 111.57 +/- 0.47 kJ/mol at 0 K (97.42 +/- 0.47 kJ/mol at 298.15 K). Close agreement was found between the ATcT (even excluding the latest theoretical result) and the FPD enthalpy.
机译：为了解决气相肼的形成长期实验焓的准确性，在早期版本的有源热化学表（ATCT）中完全证实，根据新的高端重新检查该值的出处 Center-Peterson-Dixon（FPD）品种的计算。 鉴定了在气相热化学与定义液体肼的热化学中的气相热化学和量热化学之间产生的不切实际地强烈连接的过度乐观的确定。 基于平衡所有可用知识的气相肼形成新的焓，确定为0 k的111.57 +/- 0.47kJ / mol（97.42 +/- 0.47 kJ / mol，298.15 k）。 在ATCT（甚至不包括最新理论结果）和FPD焓之间发现了密切协议。

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