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The Eyring equation (occasionally also known as Eyring–Polanyi equation) is an equation used in chemical kinetics to describe the variance of the rate of a chemical reaction with temperature. It was developed almost simultaneously in 1935 by Henry Eyring, Meredith Gwynne Evans and Michael Polanyi. This equation follows from the transition state theory (''aka'', activated-complex theory) and is trivially equivalent to the empirical Arrhenius equation which are both readily derived from statistical thermodynamics in the kinetic theory of gases.〔Chapman & Enskog 1939〕 ==General form== The general form of the Eyring–Polanyi equation somewhat resembles the Arrhenius equation: where Δ''G''‡ is the Gibbs energy of activation, ''k''B is Boltzmann's constant, and ''h'' is Planck's constant. It can be rewritten as: To find the linear form of the Eyring-Polanyi equation: where: * = reaction rate constant * = absolute temperature * = enthalpy of activation * = gas constant * = Boltzmann constant * = Planck's constant * = entropy of activation A certain chemical reaction is performed at different temperatures and the reaction rate is determined. The plot of versus gives a straight line with slope from which the enthalpy of activation can be derived and with intercept from which the entropy of activation is derived. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Eyring equation」の詳細全文を読む スポンサード リンク
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