Articles written in Pramana – Journal of Physics
Volume 70 Issue 4 April 2008 pp 731-738 Research Articles
Speeds of sound and densities of three ternary liquid systems namely, toluene $+ n$-heptane $+ n$-hexane (I), cyclohexane $+ n$-heptane $+ n$-hexane (II) and 𝑛-hexane $+ n$- heptane $+ n$-decane (III) have been measured as a function of the composition at 298.15 K at atmospheric pressure. The experimental isothermal compressibility has been evaluated from measured values of speeds of sound and density. The isothermal compressibility of these mixtures has also been computed theoretically using different models for hard sphere equations of state and Flory's statistical theory. Computed values of isothermal compressibility have been compared with experimental findings. A satisfactory agreement has been observed. The superiority of Flory's statistical theory has been established quite reasonably over hard sphere models.
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