The comparative analysis of the influence of the effect of non-linear mass transfer and the Marangoni effect on the mass transfer kinetics has been done. Co-current two-phase (gas and liquid) flow in the laminar boundary layer along the flat phase surface is considered. One of the components of the first phase reacts with a component of the second phase. The chemical reaction rate is of first order. The heat effect from the chemical reaction creates a temperature gradient, i. e. the mass transfer together with a heat transfer can be observed. Non-linear mass transfer and Marangoni effect are results of a large concentration gradient and interfacial tension gradient. The data for heat and mass transfer coefficients are obtained.