IPA: /θɜːrməʊˈkɛmɪkəl/
KK: /θɜrməˈkɛmɪkəl/
Related to the study of the relationship between heat and chemical reactions.
The thermochemical properties of the substance were analyzed during the experiment.
Thermochemical → It is formed from "thermo-" (from Greek "thermos", meaning heat) and "chemical" (from Greek "khemia", meaning the art of transmuting metals). The word "thermochemical" refers to the study of the heat involved in chemical reactions.
Think of 'heat' ('thermo-') being involved in the 'art of chemistry' ('chemical') — that's what thermochemical means.