In summary, we have shown that the thermodynamic parameters of a chemical reaction under VSC are indeed dependent on the strong coupling strength. This further illustrates that the polaritonic states are delocalised over all the molecules involved in the strong coupling and act collectively, even though the reactions are ultimately localised on single molecules. The observed changes in chemical dynamics of the present system, despite the relatively weak Rabi splitting energy compared to the TS energy of er VSC and noncavity conditions. ion of temperature under VSC (red diamonds) for the various Rabi splitting energies and the tions (blue squares). The different values of ħΩ R are shown in the plots. Least-squares method was s of the fit was assessed based on the coefficient of determination (R 2 ) value. For each fit, R 2 value