Numerous liquid systems exhibit linear behavior of the logarithm of dynamic viscosity against the the reciprocal absolute temperature. But we observe some difference between different studies of same systems due to precision, temperature range, etc..
Statistically, we cannot affirm that a strict linear behavior. So, can we conclude that is an inexistent ideal phenomenon which some liquid systems exhibit a negligible deviation from the linearity and we conclude that it is practically linear?
My guess is that a linear Arrhenius behavior of viscosity is an ideal phenomenon based on a model where there is a single type of attractive interaction between molecules (hence, one activation energy) and the distribution of energies follows the Boltzmann distribution. There must be theoretical work published on this.
Real fluids should behave somewhere between Arrhenius behavior and the curved Vogel- Tammann-Fulcher behavior.
The Arrhenius equation is indeed an ideal model for pure liquids. Despite this fact, I use this model a lot to check on viscosity vs. temperature curves of non-ldeal liquids, specially those that might loose some of a lighter component. In the later case, the experimental curve shows weird slope changes, not predicted by AE.
there are liquid systems that have a linear carectère by plotting the logarithm of the dynamic viscosity as a function of the inverse 1 / T (Arrhenius behavior) and liquid systems with a non linear, which is the gap carectère ideality (non-Arrhenius behavior)
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