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.
An Eyring plot allows the activation parameters ∆S‡ and ∆H‡ to be determined from the temperature dependence of the rate constant; the dotted part of the line represents an extrapolation. Initial attack by the entering group at a square planar Pt(II) centre is from above or below the plane.
The Eyring relationship was formulated from quantum mechanics principles, as discussed in Glasstone et al. , and is most often used when thermal stress (temperature) is the acceleration variable.However, the Eyring relationship is also often used for stress variables other than temperature, such as humidity.
The Eyring equation is also used in the study of solution reactions and mixed phase reactions - all places where the simple collision model is not very helpful. The Arrhenius equation is founded on the empirical observation that rates of reactions increase with temperature. The Eyring equation is a theoretical construct, based on transition ...
The Eyring model has a theoretical basis in chemistry and quantum mechanics and can be used to model acceleration when many stresses are involved: Henry Eyring's contributions to chemical reaction rate theory have led to a very general and powerful model for acceleration known as the Eyring Model. This model has several key features:
Analysis of Sabine and Eyring equations and their application to concert hall audience and chair absorption Article (PDF Available) in The Journal of the Acoustical Society of America 120(3):1399 ...
Henry Bennion Eyring (born May 31, 1933) is an American educational administrator, author, and religious leader. After being set apart on January 14, 2018, Eyring is currently the Second Counselor to Russell M. Nelson in the First Presidency of The Church of Jesus Christ of Latter-day Saints (LDS Church). Previously, Eyring was the First Counselor to Thomas S. Monson in the First Presidency ...
Eyring model An accelerated life testing model based on quantum mechanics that is typically used when temperature or humidity is the accelerated stress. ... This model allows the use of zero as a stress value, which enables the analysis of data with indicator variables (e.g., 0 = on/off and 1 = continuous operation).
A Discussion of Reaction Kinetics and their Application to Organic Chemistry Diane Carrera MacMillan Group Meeting June 11, 2007 ... TST is a molecular dynamical analysis for determining the energy values of barrier heights on energy surfaces, ie, rate constants ... substitution leads to the Eyring equation
The Eyring Equation, also called the Eyring-Polanyi Equation, is used to calculate the rate of a chemical reaction at different temperatures in the field of chemical kinetics. It is written as k = (k_b[t])/h) * e^(-delta.G/Rt). The Eyring Equation was developed in 1935 by theoretical chemist Henry Eyring.