Exptl. data on the temp. relationship of porcine pancreas lipase activity published by K. Bagi et al., 1997, were used to calc. the optimal temp., activation energy and deactivation energy of the olive oil hydrolysis rate according a resp. math. model of the reaction. The calc. values were 306.78 +/- 0.54 K, 86.75 +/- 11.47 kJ/mol, 122.12 +/- 7.26 kJ/mol, resp.