(Pdf) excess molar volumes, viscosity deviations and isentropic compressibility of binary mixtures containing 1,3-dioxolane and monoalcohols at 303.15 k gasco abu dhabi careers


Ultrasonic refers to study of sound waves, which are higher frequency than the human audible range. It is widely used in many applications viz. medical grade 6 electricity unit, underwater, food and oil technology etc. The Intermolecular interaction plays an important role in the development of molecular science. Substituted benzothiazole plays a vital role in the biological field such as anti-allergic, anti- inflammatory analgesic, and fungicidal activity. Therefore, present work is carried out to study the substituted benzothiazole with different concentrations at 298.15K with 2MHz. The acoustical parameters; adiabatic compressibility, linear free length, acoustic impedance, relative association etc static electricity human body evaluated with experimental values of density and ultrasonic velocity. It is observed that the density and ultrasonic velocity increases with increase the concentration of solute while adiabatic compressibility and linear free length deceases. The intermolecular interactions have been observed at molar concentrations, which suggest the solute-solvent interaction.

The excess molar volume VE, viscosity deviation Δη, excess viscosity ηE, and excess Gibbs energy of activation ΔG*E of viscous flow have been investigated from the density ρ and viscosity η measurements of eight binary mixtures of butylamine with ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol and decanol over the entire range of mole fractions e electricity bill payment at 303.15 and 313.15 K. The viscosity data have been correlated with the equations of Grunberg and Nissan [L. Grunberg, A.H. Nissan, Nature 164 (1949) 799–800], Tamura and Kurata [M. Tamura, M. Kurata gas definition science, Bull. Chem. Soc. Jpn. 25 (1952) 32–37], Hind et al. [R.K. Hind, E. McLaughlin, A.R. Ubbelohde, Trans. Faraday Soc. 56 (1960) 328–334], Katti and Chaudhri [P.K. Katti, M.M. Chaudhri, J. Chem. Eng. Data 9 (1964) 442–443], McAllister [R.A. McAllister, AIChE J. 6 (1960) 427–431], Heric [E.L. Heric, J. Chem. Eng. Data 11 (1966) 66–68], and of Auslaender [G. Auslaender, Br. Chem. Eng. 10 (1965) 196]. The systems studied exhibit very strong cross association through strong O–H⋯N bonding v gashi 2012 between –OH and –NH2 groups. As a consequence of this strong intermolecular association, all eight systems have very large negative VE. Except butylamine+ethanol mixture, the magnitude of negative deviations in viscosity increases with chain length of alkanol.

The solid–liquid equilibrium data of l-carnitine fumarate in methanol + (ethanol/1-propanol/2-propanol) binary mixed systems were determined at temperatures ranging from 288.15 to 328.15 K, while the solubility data of l-carnitine fumarate in (methanol +1-butanol) mixtures were determined from T = (293 4 gases in the atmosphere besides oxygen and nitrogen.15 to 333.15) K because of its low solubility in low temperature. All experimental data were … [Show full abstract] obtained by the gravimetric method under atmospheric pressure. At each composition point, the data increases with the increasing temperature in all determined solutions. A similar trend is also observed when the mole fraction of methanol increases in all binary solvent mixtures for each temperature. It is also found that the solubility data of l-carnitine fumarate in these binary mixtures rank as (methanol + ethanol) (methanol +1-propanol) (methanol +2-propanol) (methanol +1-butanol). The modified Apelblat equation, (CNIBS)/Redlich–Kister model, Solubility–Polarity model, and Jouyban–Acree model were employed to correlate the solubility data determined, and all of them show good agreement with experimental value. Furthermore 3 gases, the crystal morphology and size distribution of l-carnitine fumarate in different solvents was studied in order to select favorable solvents for good electricity laws uk crystal habits. Read more

The molecular interactions have been studied in the binary mixtures of 1-tert-butoxy-2-propanol (CH3)3COCH2CH(OH)CH3 with four structurally different alcohols, viz., 1-propanol CH3(CH2)2OH, 2-propanol (CH3)2CHOH, 1-butanol CH3(CH2)3OH and 2-butanol CH3CH2CH(OH)CH3, through the behavior of measured densities, ρ, speeds of sound, u at 293.15, 298.15, 303.15, 308.15 and 313.15 K and viscosities, η … [Show full abstract] at 298.15, 303.15 and 308.15 K. The experimental data were gas calculator used to calculate the excess molar volumes, VmE, excess molar isentropic compressibilities, KS,mE and deviations in speed of sound, uD. The apparent and partial molar properties and their deviations at infinite dilution were also calculated. Viscosity data were used to compute deviations in viscosity, ∆η and excess Gibbs energy of activation of viscous flow, ΔG⁎ E. Furthermore, the change in free energy, ΔG, change in enthalpy, ΔH and change in entropy, ΔS of activation of viscous flow have also been calculated. A Redlich–Kister type equation was applied to fit the excess molar volumes and deviations in isentropic compressibility, speeds of sound and viscosity data. The FT-IR and 1H NMR studies of all mixtures were also reported electricity in india. Read more

The authors have developed an analytical method for hydrophilic alcohols, 1-propanol, 2-propanol, 1-butanol, 2-butanol and tert-butanol, in water and sediment samples by solid-phase microextraction coupled with GC/MS. Extraction efficiencies of the alcohols from water were dramatically improved by adding potassium carbonate as a salting-out reagent. The mean recovery of the alcohols from water at … [Show full abstract] concentrations of 15 to 1.0 μg/1 was 94%, and the mean relative standard deviation was gas constant for nitrogen 12%. The detection limits of the alcohols ranged from 0.63 to 4.3 μg/1. In order to analyze sediment samples, the alcohols were first extracted with water and the following procedures were carried electricity and magnetism purcell out in the same manner as for water samples. The mean recovery of the alcohols from sediment samples at 20 μg/kg was 94%, and the mean relative standard deviation was 21%. The detection limits of the alcohols ranged from 6.9 to 84 μg/kg (wet). Analysis of real environmental samples from a sea sediment detected 1-propanol and 2-propanol at 140 and 500 μg/kg (dry), respectively. Read more Discover more