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Fig. 1

image

Variation of mean molecular weight μ, internal energy density of the gas (ρe)gas and first adiabatic index Γ1 with temperature. The different colored curves represent four values of fixed density in g cm-3, viz., 10-4 (red), 10-8 (green), 10-12 (blue) and 10-16 (black). The values of (ρe)gas and Γ1 are obtained at equilibrium between ortho and para hydrogen.

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