Using a diffusional model, mass transfer in rehydration of slab-shaped bodies was simulated. For that purpose the rehydration kinetics of broccoli stem slabs was investigated and the influence of temperature determined. It was observed that rehydration rate increased with water temperature but the final moisture content decreased. A good agreement between the model and the experimental data was obtained when D-eff and W-e values were identified for each temperature (average %var 99.3). The temperature influence on D-eff was interpreted by the Arrhenius relationship, with an activation energy of 17.9 kJ/mol.