Thomson-Berthelot principle

Thomson-Berthelot principle

[′täm·sən ber·tə′lō ‚prin·sə·pəl]
(physical chemistry)
The assumption that the heat released in a chemical reaction is directly related to the chemical affinity, and that, in the absence of the application of external energy, that chemical reaction which releases the greatest heat is favored over others; the principle is in general incorrect, but applies in certain special cases.