In this Letter, a new simple rate equation is derived to describe the rate of dissociative adsorption on solid surfaces. This rate equation is obtained according to Langmuir model for dissociative adsorption. This new equation is simple and easy to analyze. To analyze the accuracy of the new equation, several sets of hypothetical kinetic points were generated. The created points proved that results of the new equation were in a perfect agreement with our theoretical derivation. Analysis of experimental data confirms the results of the present study. Theoretical and experimental data confirmed the applicability of the new equation. (C) 2013 Elsevier B. V. All rights reserved.