This study examines the effects of various parameters on the nonisothermal gas absorption. A pair of coupled irreversible and reversible (1, 1) order exothermic chemical reactions are considered in this research. The film model is employed to describe the heat and mass transfer. The interfacial temperature rise and the enhancement factors are determined nonlinearly by Muller's method. The nonisothermal effects of gas absorption are presented as functions of the dimensionless group M1/2 at given thermophysical properties and kinetic parameters. The analyses provide useful information for nonisothermal reactor design and modeling.