What Is an Arrhenius Plot?


Quick Answer

An Arrhenius plot is used to assess the impact temperature has on chemical reactions. It plots the inverse temperature against kinetic constants logarithm. An Arrhenius plot yields a straight line of a solitary-rate limited, thermally activated processes, from which the pre-exponential factor and the activation energy are determined.

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What Is an Arrhenius Plot?
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Full Answer

An Arrhenius equation is represented by this equation: k = Ae –Ea/RT.

Ea stands for activation energy. The denominator of this exponential function has a letter R, which is a constant, and T, which stands for temperature. The equation is used when dealing with moles of a substance as R has j/mol*k units. The case changes when it is about molecules of a substance as the gas constant in the exponential equation is substituted by a constant K.

According to Kiel University, the Arrhenius plot becomes exceedingly useful when its data are determined experimentally. If there are enough data points to arrive at unambiguous values and an Arrhenius relation to the pre-exponential factor and activation energy, it shows how large or small the scatter of data points is. It is crucial to know that the Arrhenius equation is related to collision theory, which states that particles should crash with enough energy and with proper orientation.

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