a. What is the chemical formula of the solid represented by the vertical phase boundary passing through point g? (Hint: use mole fractions of A and B)
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a. What is the chemical formula of the solid represented by the vertical phase boundary passing through point g? (Hint: use mole fractions of A and B)
b. Suppose we have a solid mixture represented by point k. How much of the solid in letter a is in equilibrium per kg of pure B?
Given the Txy diagram below of a two-component (A and B) solid-liquid system.
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- A polynomial fit to measurements of the total volume of a binary mixture of A and B isv = 778.55 − 22.5749x + 0.568 92x2 + 0.010 23x3 + 0.002 34x4where v = V/cm3, x = nB/mol, and nB is the amount of B present. Derive an expression for the partial molar volume of B.Explain the significance of a partial molar quantity andhow it depends on composition.Two hundred kilogram of liquid contains 40% butane, 40% pentane and 20% hexane by mass. Determine the mole fraction composition of the liquid and the mass fraction composition on a hexane-free basis.
- What 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)Consider the data in the table. Compound Melting point (°C) ????? (??/???)ΔHfus (kJ/mol) Boiling point (°C) ????? (??/???)ΔHvap (kJ/mol) HFHF −83.11 4.577 19.54 25.18 HClHCl −114.3 1.991 −84.9 17.53 HBrHBr −86.96 2.406 −67.0 19.27 HIHI −50.91 2.871 −35.38 21.16 Using the data in the table, calculate Δ?fus and Δ?vap for HF. Δ?fus= J/(K⋅mol) Δ?vap= J/(K⋅mol) Determine the entropy change when 8.70 mol HF(g) condenses at atmospheric pressure. Δ?= J/KComelli and Francesconi examined mixtures of propionic acid with various other organic liquids at 313.15 K (F. Comelli and R. Francesconi, J. Chem. Eng. Data 41, 101 (1996)). They report the excess volume of mixing propionic acid with tetrahydropyran (THP, oxane) as VE = x1x2{a0 + a1(x1 − x2)}, where x1 is the mole fraction of propionic acid, x2 that of THP, a0 = −2.4697 cm3 mol−1, and a1 = 0.0608 cm3 mol−1. The density of propionic acid at this temperature is 0.971 74 g cm−3; that of THP is 0.863 98 g cm−3. (a) Derive an expression for the partial molar volume of each component at this temperature. (b) Compute the partial molar volume for each component in an equimolar mixture.
- does the boiling point of liquid solution independent of its composition (yes or no?)Under what conditions does the extended Debye-Huckel law, equation 8.52, become the Debye-Hckel limiting law?The vapour pressure of pyridine is 50.0 kPa at 365.7 Kand the normal boi ling point is 388.4 K. W hat is the enthalpyof vaporization of pyridine?
- The pure vapour pressure of benzene (C6H6) is 745 torr; the pure vapour pressure to toluene(C7H8) is 290 torr. What is the mole fraction of benzene in a benzene/toluene mixture whose total vapour pressure is 500 torr? Give answer to 3dp.What is maximum number of phases that can bein mutual equilibrium in three-component system?Explain the significance of the Clapeyron equation and of the Clausius-Clapeyron equation.