Which of the following phase diagrams corresponds to a system wherein the upper critical temperature is less than the boiling point at all compositions?|210Compositionof onephaseP.1VapourP.2292P+2290Compositionof secondphaseP.2LiquidP= 2Liquid273P.1P.1Liquid, P 2Mole fraction of B, XaMole fraction of B,BDEAETemperature,ООО О с

Which of the following phase diagrams corresponds to a system wherein the upper critical temperature is less than the boiling point at all composition TIK |210 Vapour Compositon of one phase P.1 Vapour P.2 292 290 P+2 P=2 Compostion of second phase P.2 Liquid Pa1 273 P.1 Liquid, P-2 Mole fraction of B, Mole fraction of B, A B D E A O O O C Temperature, 1

Which of the following phase diagrams corresponds to a system wherein the upper critical temperature is less than the boiling point at all composition TIK |210 Vapour Compositon of one phase P.1 Vapour P.2 292 290 P+2 P=2 Compostion of second phase P.2 Liquid Pa1 273 P.1 Liquid, P-2 Mole fraction of B, Mole fraction of B, A B D E A O O O C Temperature, 1

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter16: Spontaneity, Entropy, And Free Energy

Section: Chapter Questions

Problem 114CP: Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution...

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Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25C. The vapor above the solution is collected and condensed. Using the following data, determine the composition in mole fraction of the condensed vapor. Substance Gfo C6H6(l) 124.50 kJ/mol C6H6(g) 129.66 kJ/mol CCI4(l) 65.21 kJ/mol CCI4,(g) 60.59 kJ/mol
10.The diagram below is an example of Liquid-Solid-Temperature Composition Phase Diagram of Completely Immiscible Solids. The left vertical line is B rich while the right vertical line is A-rich.Define the phases present in the region from A to E. |LS – TZ Phase Diagram: Completely Immiscible Solids This LS- TZ phase diagram is for completely immiscible solids. XA = 0 X = 1 XA = 1 X = 0 T =T?, At the solid phase, the system consists of 2 distinct solids A and B. T= T At the liquid phase, the system is called a melt. At the 2- phase regions, the system consists of either pure solid A or B and the melt. The composition of A in the melt can be traced along the liquidous curve. T T= Teu E At the solidous line, the system consists of solids A, B, and melt in which the composition of A, or y =1 Z, can be determined. Ya = 0 Zeut,a Za YA =1 Yn = 0 At the eutectic composition, minimum temperature is required to melt the mixture.
8. The diagram below is an example of Liquid-Solid-Temperature Composition Phase Diagram of Partially Miscible Solids.The left vertical line is B rich while the right vertical line is A-rich.Define the phases present in the region A to F. LS – TZ Phase Diagram: Partially Miscible Solids T= Tm This type of mixture is for partially miscible solids At the solid region: • The B- rich region, or the ß phase T • The A- rich region, or the a phase At each single solid- phase region, there are 2 different forms of the solid solution. T = T T = Teu Lever Rule applies to all 2– phase regions. E Za
A solution containing 1.470 g of dichlorobenzene in 50.00 g of benzene boils at 80.60 degree C and a pressureof 1.00 bar. The boiling point of pure benzene is 80.09 degree C, and the molar enthalpy of vaporization of purebenzene is 32.0 kJ/mol. Determine the molecular mass of dichlorobenzene
Pure naphthalene melts at 80 °C. Pure I-naphthol melts at 123°C. All mixtures of these two components show a single peak when heated and a 50 mol% mixture shows a single broad peak around 100 °C. What type of phase diagram does this suggest? Draw a hypothetical example of this type of phase diagram.
The following temperature/composition data were obtained for a mixture of two liquids A and B at 1.00 atm, where x is the mole fraction in the liquid and y the mole fraction in the vapor at equilibrium 140 125 130 135 145 150 ТРС 0.91 0.65 0.45 0.30 0.18 0.098 ХА 0.99 0.91 0.77 0.61 0.45 0.25 The boiling points are 124 °C for A and 155 °C for B a) Plot the temperature composition diagram for the mixture. b) What is the composition of the vapor in equilibrium with the liquid of composition (i) 0.50, and (ii) x = 0.33? ХА
973 14. On the right is the phase diagram of the binary mixture between Zn and Mg under 1 atm. pressure. A 873 Which of the following best represents the cooling curve from point A to point B in the phase diagram? 773 673 653 620 573 473 20 40 60 80 100 Zn Mg Mole percent Mg A B Time Time Time D E F Time Time Time H Time Time Time Temperature Temperature (K) Temperature Temperature
The vapour pressure of hexane between -10°C and +90°C fits the expression log(p/Torr) = 7.724 – 1655/(T/K). Calculate the enthalpy of vaporization.
Consider a system where 2.40 mol of CH3CN(g) are converted into CH3CN(1) at 1.00 atm and 82.0 °C. The normal boiling point of CH3CN is 82.0 °C, and AvapH much less than the volume of CH3CN(g). 29.75 kJ mol-1. Assume the volume of CH3CN(I) is What is the enthalpy change for the process described above? Enter your answer in kilojoules accurate to three significant figures. Do not use scientific/exponential notation. AH= Number kJ. What is the work done during the process described above? w= -7087.0 J w= 798.2 J w= -69.9 J w = 69.9 ) w = 7087.0 J O O O
The standard enthalpy of vaporization (H°vap) of ethylenediamine ((NH2CH2)2) is 44.0 kJ/mol.The normal boiling point of ethylenediamine is 116.5°C.Calculate the vapour pressure of ethylenediamine at 102.0°C.
5.The diagram below is an example of Two Partially Miscible Liquids (T vs Mole Fraction).Fill out the question marks with correct number of degrees of freedom. Material Equilibrium: 2 Partially Miscible Liquids At constant P: T= T • 2 components ( Liquids A and B) • p phases (liquid, gas) • No reactions • No ions / electrolytes Concentration is not specified T Number of independent components, Cing = c -r-a = 2 F=? F=? Fm? F=? T = T F=? Thus, T = Tuc F = Cind -p+ 2 F= 2-p+1 F=? F= 3-p ZA
The vapor pressures of pure ethyl alcohol and pure isopropyl alcohol are 60.8 mmHg and 45.2 mmHg at 25 °C, respectively. What is the isopropyl alcohol mole percent in the vapor in equilibrium with a liquid mixture, which is composed of ethyl alcohol and isopropyl alcohol, in which the mole fraction of ethyl alcohol is 0.14?