Speeds of sound in and isentropic compressibilities of (n-butanol+n-pentane, orn-hexane, orn-heptane, orn-octane, or 2,2,4-trimethylpentane, or carbon tetrachloride) atT=293.15 K

✍ Scribed by Jagan Nath

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 213 KB
• Volume: 29
• Category: Article
• ISSN: 0021-9614
• DOI: 10.1006/jcht.1997.0200

✦ Synopsis

Measurements of speeds of sound u have been made in binary mixtures of n-butanol (n-C4H9OH) with n-pentane (n-C5H12), or n-hexane (n-C6H14), or n-heptane (n-C7H16), or n-octane (n-C8H18), or 2,2,4-trimethylpentane (2,2,4-(CH3)3C5H9), or carbon tetrachloride (CCl4) at T= 293.15 K. Values of u have been used to calculate the apparent excess speeds of sound Du and the isentropic compressibilities kS for these mixtures. The excess isentropic compressibilities k E S have also been calculated from the values of kS. The k E S values have been found to be highly negative for {xn-C4H9OH + (1 -x)n-C5H12 }. The values of k E S have been found to be positive at lower mole fractions for n-C4H9OH, and negative at higher mole fractions for 4xn-C4H9OH

, and 4xn-C4H9OH + (1 -x) CCl45. The inversion of sign in k E S occurs at x 1 0.20, x 1 0.54, x 1 0.77, x 1 0.23, and x 1 0.75, respectively, for these mixtures.