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Trang chủTừ điểnAactivation volume

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activation volume

The difference between the partial molar volume of the transition state and the sum of the partial molar volumes of the reactants in a chemical reaction.
Danh từ

This term is a specialized technical expression used almost exclusively in chemical kinetics and thermodynamics. It describes the sensitivity of a reaction rate to changes in pressure, serving as a diagnostic tool to determine the structural nature of the transition state.

Because it is a specific physical property, it is treated as an uncountable noun in scientific discourse. It is typically used in the singular to refer to the general concept or a specific value for a given reaction, and does not typically take a plural form in standard chemical literature.

Ý nghĩa

Danh từ

The difference between the partial molar volume of the transition state and the sum of the partial molar volumes of the reactants in a chemical reaction.

The activation volume provides critical insight into the mechanism of a reaction by indicating whether the transition state is more or less compact than the reactants.

Ví dụ

The activation volume is calculated by measuring the rate constant under different pressures.

The activation volume is calculated by measuring the rate constant under different pressures.

A negative activation volume suggests that the transition state is more compact than the reactants.

A negative activation volume suggests that the transition state is more compact than the reactants.

We need to determine the activation volume to understand the reaction mechanism.

We need to determine the activation volume to understand the reaction mechanism.

Office

Does this specific catalyst significantly alter the activation volume of the process?

Does this specific catalyst significantly alter the activation volume of the process?

The measured activation volume was surprisingly large for a simple substitution reaction.

The measured activation volume was surprisingly large for a simple substitution reaction.

I wonder if the solvent effect is influencing the observed activation volume.

I wonder if the solvent effect is influencing the observed activation volume.

Pressure dependence of the rate constant allows for the derivation of the activation volume.

Pressure dependence of the rate constant allows for the derivation of the activation volume.

School Life

The activation volume provides a direct probe into the structural changes during the transition state.

The activation volume provides a direct probe into the structural changes during the transition state.

Let us check if the activation volume remains constant across this temperature range.

Let us check if the activation volume remains constant across this temperature range.

Office

Từ liên quan

activation energypressurevolumethermodynamicskineticscatalysisreactionrateequilibriumenthalpyentropyGibbs energytransition stateactivated complexcompressionexpansiondensityArrhenius equationbarrierthresholdmechanismcollisionmoleculeatomlatticediffusionviscosityfluiditysolventsoluteconcentrationtemperatureisothermalisobaricadiabaticchemical potentialfugacityactivitycoefficientstressstrainelasticityplasticitydeformationcrystallizationnucleationphase transitionadsorptiondesorptioncatalystinhibitoractivationdeactivationthermodynamicactivation enthalpy
Cập nhật lần cuối: May 2026Báo lỗi