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相关概念视频

Hess's Law03:40

Hess's Law

There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.

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相关实验视频

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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
08:51

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德国的研究. 赫尔姆霍尔茨的改革使科学家们平静下来.

G Vogel

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    No abstract available in PubMed .

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