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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 componentsWhat is the chemical formula of the solid represented by the verticalphase boundary passing through point g? (Hint: use mole fractions of A and B to answer this)What is maximum number of phases that can bein mutual equilibrium in three-component system?
- In what pressure range and in what temperature range must H2O exist in order for H2O1s2 to sublime to H2O1g2?On a molecular level that is the order in which the two liquids analyzed elutes the gc. Two liquids: cyclohexane and tolueneEthanoic acid vapour contains a proportion of planar. hydrogen-bonded dimers . The apparent dipole moment of molecules in pure gaseous acetic acid increases with increas ing temperature. Suggest an interpretation of the latter observation.
- factors which would contribure to departure from Nernstian behaviour.Mark the following points on a ternary phase diagram for the system NaCl/Na2SO4⋅10H2O/H2O: (i) 33 per cent by mass NaCl, 33 per cent Na2SO4⋅10H2O, and the rest H2O, (ii) the line denoting the same relative composition of the two salts but with changing amounts of water.a) The following temperature composition data were obtained for a mixture of two liquids A and B at one atmosphere, where x is the mole fraction of A in the liquid and y is the mole fraction of A in the vapour, at equilibrium.t/ oC 125 130 135 140 145 150xA 0.91 0.65 0.45 0.30 0.18 0.098yA 0.99 0.91 0.77 0.61 0.45 0.25the boiling points are 124 oC for A and 155 oC for B. Plot the temperature-composition diagram for the mixture on a graph sheet. What is the composition of the vapour in the equilibrium with the liquid of composition i) xA = 0.50 and ii) xB= 0.33
- 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 0.164Which 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, IIIWhich 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.