Comportamento termodinâmico de cadeias de dímeros
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Data
2016-10-31Autor
Nascimento, Denise Andrade do
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In this Thesis we propose to describe the thermodynamical properties of dimer chains
in a one-dimensional lattice rstly considering q-states of chain orientation in the lattice
and secondly by a three states model where the chain orientation is associated with a
energy " > 0 or " = 0. For this reason we describe our system by a microcanonical
ensemble to get the canonical partition function and through this function obtain the
Helmholtz free energy, the entropy, internal energy and pressure. We solved also the
problem by adopting the grand canonical ensemble using the transfer matrix method and
we get in the thermodynamical limit the equivalence between both ensembles. However
the analysis of the thermodynamic properties for systems with nite size is quite relevant
since for these nite systems can be found a inequivalence of ensembles. Thereby we performed
a detailed study of the Statistical Mechanics for nite particles systems verifying
the equivalence o ensembles.