Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equilibrium thermodynamic properties of two-component and two phase
  mixtures   We present general calculations allowing to express the thermodynamical
coefficients and thermophysical properties (compressibility, thermal
coefficients and heat capacities) of a material composed of a mixture of two
constituents or phases, regardless of the equations of state considered for
each of the constituant or for the mixture. We consider mixtures under complete
thermodynamical equilibrium, either with mass exchange between the two
constituents (phase change), such as an oil and gas mixture (black-oil) and
water-vapor system or with two immiscible phases, such as air and water
mixtures (foam).
  Keywords Thermodynamic coefficient, Thermophysical properties, thermal
coefficients, speed of sound, two phase systems, liquid vapor equilibrium

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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph