A model for the mass-transfer-controlled spherical bubble growth in a quiescent liquid is presented. The liquid is of variable diffusion coefficient, which depends exponentially on the concentration. Using the method presented in Scriven [L.E. Scriven, On the dynamics of phase growth, Chem. Eng. Sci. 10 (1959) 1-13], for a constant diffusion coefficient liquid, the differential binary mass balance was transformed into an ordinary differential equation, trough a similarity transformation, which was numerically solved. The final results were also compared with approximately analytical solutions, for slow and fast growth rates, developed by Polyanin and Dil＇man [A.D. Polyanin, V.V. Dil＇man, The method of the ＇carry over＇ of integral transforms in non-linear mass and heat transfer problems, Int. J. Heat Mass Trans. 33 ( 1990) 175-181] and by the authors.