Comment on “Group solution of a time dependent chemical convective process” by M.M. Kassem and A.S. Rashed, Applied Mathematics and Computation, 215 (2009) 1671-1684

The mathematical model formulated by M.M. Kassem and A.S. Rashed in their article: “Group solution of a time dependent chemical convective process, Applied Mathematics and Computation, 215 (2009) 1671-1684”, through group analysis, is reformulated and interpreted correctly so that it can represent a feasible situation. A perturbation analysis that replaces their incorrect analysis is performed and proved to compare well with a finite difference solution of the problem.