A multicomponent evaporation and dissolution model was applied to study the dynamics of the mass transfer of dispersed oil in shallow waters. This model, in Lagrangian form, was coupled with the Princeton Ocean Circulation model (POM) for simulating oil droplet dispersion in an oceanic environment. The oil dispersion was modeled for a standard sea-mount shallow water environment. The most abundant petroleum hydrocarbons in the hydrocarbon-enriched of oil plum larger than C 1 -C 5 were benzene, toluene, ethylbenzene, and total xylenes. Therefore, the oil surrogate, which consists of these components, is studied. The liquid-liquid equilibrium and vapor-liquid equilibrium equations are solved for evaluating the droplet life time. A rapid mixing model is used by reason of the shorter internal mass diffusion time scale in comparison to the droplet life time. Four different droplet sizes, 1.5, 1, 0.5, and 0.1mm, are considered in this study. The droplet with a diameter of 1mm has a shorter life time in this specific environment.