Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature dependent dynamics in water-ethanol liquid mixtures   Temperature dependent hydrogen bond energetics and dynamical features, such
as the diffusion coefficient and reorientational times, have been determined
for ethanol-water mixtures with 10, 20 and 30 mol % of ethanol. Concerning
pairwise interaction energies between molecules, it is found that water-water
interactions become stronger, while ethanol-ethanol ones become significantly
weaker in the mixtures than the corresponding values characteristic to the pure
substances. Concerning the diffusion processes, for all concentrations the
activation barrier of water and ethanol molecule become very similar to each
other. Reorientation motions of water and ethanol become slower as ethanol
concentration is increasing. Characteristic reorientational times of water in
the mixtures are substantially longer than these values in the pure substance.
On the other hand, this change for ethanol is only moderate. The reorientation
motions of water (especially the ones related to the H-bonded interaction)
become very similar for those of ethanol in the mixtures.

28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph