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The Berthelot-Thomsen Principle: Heat in Chemical Changes

The Berthelot-Thomsen Principle, formulated by Marcellin Berthelot and Julius Thomsen, states that all chemical changes are accompanied by heat production, and processes that occur will release the most heat. This principle emphasizes the exothermic nature of chemical reactions and their relationship with thermodynamic processes. The work of these chemists laid the foundation for understanding the energetics of chemical reactions, significantly influencing the field of thermochemistry.

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The Berthelot-Thomsen Principle: Heat in Chemical Changes

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  1. Berthelot – Thomsen Principle Julius Thomsen Marcellin Berthelot (1826 – 1909) (1827 – 1907) All chemical changes are accompanied by the production of heatand that processes which occur will be ones in which the most heat is produced.

  2. J. Willard Gibbs (1839 – 1903)

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