TIK |210 Compositon of one phase P.1 Vapour 292 290 P+2 Composton fsecond phase P2 Liquid 273 P.1 Liuid, P2 Mole fraction of B, Mole traction of 8. B E
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- 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.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 dichlorobenzeneSolid benzene melts at 28.35 °C when the pressure is 85.2 MPa. The molar volumes of solid and liquidbenzene at these conditions are 74.25 cm3 mol-1and 82.55 cm3 mol-1, respectively.High Temperature Materials and Processes 26 (2007) 365-369 a. When the pressure is increased to 128 MPa, benzene is found to melt at 39.85 °C. Calculate theenthalpy and entropy of fusion of the solid. b. Estimate the freezing temperature of benzene at 92.5 MPa
- Diethyl ether, a liquid that has been used as an anesthetic, has a vapour pressure of 185 torr at 0 °C. At 10 °C its vapour pressure is 0.384 atm. What is the heat of vaporization of diethyl ether in kJ/mol? Estimate the normal boiling point of diethyl ether in °C. Given that latm = 760 torr. AHvap (-) 1 [Hint: In P2 R T2Consider 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 OAdding table salt to water elevates its boiling temperature and speeds up the cooking process (although to what extent depends on how much the boiling point is increased). If one tablespoon of table salt (17 g, 0.291 mol) is added to 2 L of water (Kb = 0.512 °C m-1), what is the boiling point elevation of that water?
- During an experiment to determine the value of R a student collected the following data:Molarity of HCl 3.00MVolume of HCl 20.3mlMass of Mg 0.0411gVolume before equalization chamber 43.1mlVolume after equalization chamber 42.7mlBarometric pressure 759.1mmHgTemperature 21.9Calculate the following information and show all work.Moles of Mg reacted ____Moles of H2 formed ____Vapor pressure of water 19.8mmHgPressure of H2 from dalton’s law ____Volume of H2 ____Temperature(k) ____Calculated R value _______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.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
- Q3b. Draw and explain the phase diagram of sulfur system. At 200 °C, the specific volume of water and steam are respectively 1 c.c. and 1673 c.c. Calculate the change in vapour pressure of the system by 20 °C change in temperature. The molar heat of vaporization of water in this range may be taken as 9.70 K cal.In this lab, you will determine the vapour pressure (P) of water at various temperatures and use this data to find its enthalpy of vaporization (AvapH). More generally, for an unknown liquid: if a plot of In P vs. 1/T gives a slope of -7517 K, what is its AvapH in kJ/mol? Do not worry about how realistic the value is. Assume R = 8.314 J mol-¹ K-¹. Answer:Question 8 Which of the following phase diagrams corresponds to a system wherein boiling occurs before the two liquids are fully miscible? TIK |210 Composition of one chane P.1 Vapour P.2 292 290 P.2 Compostion of second phase uid. P= 2 Liquia 273 Liquid P.1 Liquid, P- 2 Mole fraction of B, Mole fraction of B. B D E ОЕ O A D O B ооос о Temperature, T