heat capacity of activation, Δ‡Cp⚬

https://doi.org/10.1351/goldbook.H02754
A quantity related to the temperature coefficient of Δ‡H (enthalpy of activation) and Δ‡S (entropy of activation) according to the equations: Δ‡Cp=(∂Δ‡H∂T)p=T (∂Δ‡S∂T)p If the rate constant is expressible in the form ln⁡k=aT+b+c ln⁡T+dT, then: Δ‡Cp=(c−1) R+2 d(R T) SI unit: Jmol−1K−1.
Sources:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1120 [Terms] [Paper]
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 168 [Terms] [Paper]
Citation: 'heat capacity of activation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.H02754 RIS BibTex EndNote
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Last revised: October 7, 2008