Thermophysical Properties Study for the Binary Mixtures of (Acetonitrile+ Trichloroethylene, or Tetrachloroethylene) at Different Temperature
محل انتشار: بیست و یکمین کنفرانس شیمی فیزیک انجمن شیمی ایران
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 248
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شناسه ملی سند علمی:
ISPTC21_011
تاریخ نمایه سازی: 30 دی 1397
چکیده مقاله:
In the present work, viscosities, η, for binary mixture of (x1 acetonitryle +x2trichloroethylene) and (x1 acetonitryle +x2 tetrachloroethylene) have been measured atatmospheric pressure and in the entire composition range. These quantities have been used tocalculate viscosity deviations, Δη. These deviation quantities have been fitted to the Redlich–Kister equation [1]. The obtained correlations were used to calculate the other thermophysicalfunctions such as the excess free energy of activation for viscous flow ΔG*E have beencalculated. The aim of this work is to provide results for the characterization of the molecularinteractions in these mixtures. Viscosities of the binary mixtures under study were measured andtheir deviations were calculated as a function of composition and temperature. The results ofsuch calculations show that viscosity deviations are negative over entire composition range at alltemperatures for all of the binary mixtures, and become less negative with increasingtemperature. This effect confirms this deduction that the attractive interactions betweencomponents of the mixtures make weaker with increasing temperature and then they can floweaser with lower viscosity [2].Air tight stopper bottles were used for the preparation of the mixtures. The mass of drybottle was first determined. The less volatile component of the mixture was introduced in thebottle, and the total mass was recorded. Subsequently, the other component was added, and themass of bottle including two components was determined. Each mixture was immediately used,after it was mixed by shaking. All the weightings were performed on an electronic digitalbalance (AB 204-N Mettler) accurate to ±1×10−5g. The uncertainty in the mole fraction isestimated to be lower than ±1×10−4. Conversion to molar quantities was based on the relativeatomic mass table of 2006 issued by IUPAC [3]. The uncertainty in the excess molar volumesestimated to be ±1×10−4 cm3. mol-1.Viscosity was determined using an Ubbelohde viscometer which was fixed in a water bathand the temperature was controlled with a precision of ±0.01 K. The flow times were taken byusing a digital chronometer model of KENKO KK-5898 with a precision of ±0.01 second [4,5].
کلیدواژه ها:
نویسندگان
Hadi Taheri Parsa
Department of Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
Hossein Iloukhani
Department of Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
Khatereh Khanlarzadeh
Department of Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
Fatemeh Sheikhi
Department of Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran