“Arrhenius equation”的概念、定义、翻译、参考文献-科学参考

Arrhenius equation

Chemistry

An equation of the form
$k = A exp (- E_{a} / R T)$
where k is the rate constant of a given reaction and E _a the activation energy. A is a constant for a given reaction, called the pre-exponential factor (or A-factor). Often the equation is written in logarithmic form
$ln k = ln A - E_{a} / R T$
A graph of lnk against 1/T is a straight line with a gradient –E_a/R and an intercept on the lnk axis of lnA. It is named after Svante Arrhenius.

Chemical Engineering

An equation that represents the effect of temperature on the velocity of a chemical reaction expressed as:
$\frac{d ln k}{d T} = \frac{E_{a}}{R T^{2}} or k = A e^{\frac{- E_{a}}{R T}}$

where k is the rate constant for the reaction, E_a is the activation energy, R is the gas constant, T is the absolute temperature and A is frequency factor. An Arrhenius plot of lnk against 1/T gives a straight line of slope –E/R and is valid for a large number of chemical reactions. It is named after Swedish chemist and physicist Svante August Arrhenius (1859–1927).

Electronics and Electrical Engineering

A physical model that expresses the variation, R(T), of some device parameter or material property as a function of operating temperature, T:
$R (T) = A e x p (- \frac{A_{E}}{k T})$
where k is the Boltzmann constant. The constant A_E is a measure of the average behaviour of a population of items and is the ‘empirical’ activation energy of the physical process.

单词	Arrhenius equation
释义	Arrhenius equation Chemistry An equation of the form $k = A exp (- E_{a} / R T)$ where k is the rate constant of a given reaction and E _a the activation energy. A is a constant for a given reaction, called the pre-exponential factor (or A-factor). Often the equation is written in logarithmic form $ln k = ln A - E_{a} / R T$ A graph of lnk against 1/T is a straight line with a gradient –E_a/R and an intercept on the lnk axis of lnA. It is named after Svante Arrhenius. Chemical Engineering An equation that represents the effect of temperature on the velocity of a chemical reaction expressed as: $\frac{d ln k}{d T} = \frac{E_{a}}{R T^{2}} or k = A e^{\frac{- E_{a}}{R T}}$ where k is the rate constant for the reaction, E_a is the activation energy, R is the gas constant, T is the absolute temperature and A is frequency factor. An Arrhenius plot of lnk against 1/T gives a straight line of slope –E/R and is valid for a large number of chemical reactions. It is named after Swedish chemist and physicist Svante August Arrhenius (1859–1927). Electronics and Electrical Engineering A physical model that expresses the variation, R(T), of some device parameter or material property as a function of operating temperature, T: $R (T) = A e x p (- \frac{A_{E}}{k T})$ where k is the Boltzmann constant. The constant A_E is a measure of the average behaviour of a population of items and is the ‘empirical’ activation energy of the physical process.
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