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may 1, 1840 - 'Heat of Reaction' began describing the first law of thermodynamics

Description:

In 1840, Germain Hess stated a conservation law for the so-called 'heat of reaction' for chemical reactions.

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History & Dietetics

ByKatelynne Burghardt, MS, RDN, LD, CEDRD (She/Her)
22 Apr 2021

Date:

may 1, 1840
Now
~ 184 years ago
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