boiling point boiling point BPtof pure A vapour composition liquid composition Bpt of pure B OA 1.0B 1.0 A OB mole fractions Create your scale on the x and y axes. Estimate the boiling point of the mixture which is composed of 80% A and 20% B. What will be the vapor composition? SUBMIT YOUR SOLUTION WITH ILLUSTRATION AND APPROPRIATE LABELS ON THE DIAGRAM.
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- The vapor pressures of 1,2-dibromoethane (M = 187.9 g mol-1and 1,2-dibromopropane (M =201.9 g mol-1), both measured at 343 K, are 12.90 and 9.17 kPa, respectively. Assuming thatthese two liquids form an ideal mixture, calculate the pressure of the vapor phase which is inequilibrium at 343 K with a liquid containing 50 % by mass of each of these componentsA solution of common salt in water is prepared by adding 50kg of salt to 200kg of water tomake a liquid density of 1250kg/m3. Calculate the concentration of salt in this solution as a: i) Weight(w/w)fraction (Ans: weight fraction 20%)1 At a temperature of 302.8 K, mixtures of phenol andwater exist as two separate phases with mole fractionsof phenol of 0.30 and 0.93. Use the lever rule to determine the relative amounts of the two phases for amixture w ith an overall mole fraction of phenol of 0.45.
- Define the relative amounts of liquid and vapor phases in a saturated mixtureare specified by the quality x.Determine the boiling point elevation of 5 m ("molal") NaOH in ⁰C. Ebuillioscopic constant of the solvent used is 0.7 ⁰C/m.Calculate the boiling point (Tbp) of an aqueous solution that is 2.222molal sucrose(aq)under standard conditions. Report the value with 4 sig figs.
- The table below shows temperature/composition data collected for a mixture of methylbenzene (M) and octane (O) at 1 atm. Recall that x stands for the mole fraction in the liquid and y stands for the mole fraction in the vapor in equilibrium. The boiling points for methylbenzene (M) and octane (O) are 110.60C and 125.60C, respectively. Construct the phase diagram with Temperature vs. xM. What is the composition of the vapor in equilibrium with the liquid of composition (a) xM = 0.250 and (b) xO = 0.250. T (0C) 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0 xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097 yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.164A mixture of organic solvent (nitrobenzene) and water boils at 363K. The vapour pressure of water at 363K is 733mm. Calculate the weight percentage of the organicsolvent in the distillate.Which of the following statement/s is/are TRUE? The Arrhenius Theory cannot be applied to account for the behavior of the molar conductivity of strong electrolytes, since these solutes are completely dissociated, at least in dilute solutions. Debye=Huckel Theory of interionic attraction satisfactorily explains the variation of the molecular conductivity of strong electrolytes with concentration. The ions interact with the solvent molecules through dipole-dipole interaction. When an electric potential is applied across the solution, the ions migrate and the ionic atmosphere around these ions is modified. I, II, IV I, III II, III, IV I, II I, II, III
- Which of the following statement/s is/are TRUE? The Arrhenius Theory cannot be applied to account for the behavior of the molar conductivity of strong electrolytes, since these solutes are completely dissociated, at least in dilute solutions. Debye=Huckel Theory of interionic attraction satisfactorily explains the variation of the molecular conductivity of strong electrolytes with concentration. The ions interact with the solvent molecules through dipole-dipole interaction. When an electric potential is applied across the solution, the ions migrate and the ionic atmosphere around these ions is modified.Polyethylene glycol 400 (PEG400) is a nonvolatile liquid polymer, which when mixed with water canbe used as a base for parenteral formulations. The designation “400” means that the molecular weightof PEG molecules is approximately 400 g/mol. Preparation with water (ΔHv = 40.7 kJ/mol) requires that the two be mixed at 56 oC, at which the equilibrium vapor pressure of pure water is 16.5 kPa. a. If 105 g of PEG400 are added to 500 g of water at 56 oC, what will the boiling temperature of the solution be?The freezing-point of depression of a 0.010 b acetic acid solution is 0.00193 K. Calculate thedegree of dissociation for acetic acid at this concentration. Cryoscopic constant for the aceticacid is 1.86 K mol kg mol-1.