Abstract
This paper provides exact solution of Arrhenius equation for non-isothermal kinetics at constant heating rate and nth-order of reaction instead of using numerical methods. This model is built to be capable of solving one and multi-order of reaction which is based on natural chemical components and other additives. We note that the presented solution can be useful to give more significant physical description than the previous approximation methods under the same values of the activation energy and pre-exponential factor parameters, and more generally the method may enable us to control parameters which is deterministic but unknown.