To fully explore the efficiency of mechanochemically assisted chemical reactions, it is necessary to establish a theoretical framework from which to properly describe the system kinetics. Since the study here is operating under a constant total energy (temperature + strain energy) and is based on molecular strains, we re-write the Bell 49 formalism to describe the force along some reaction coordinate as a PV work term, which the tensorial nature of should well describe our many-body deformations.