The following is the equilibrium diagram for two compounds A and B, each has a melting point of 80 °C. With reference to the diagram, what is the composition of the eutectic mixture? 80 °C 80 °C Liquid liquid + Asolid liquid + Bsolid 40 °C Eutectic point Asolid + Bsolid A B 50% 100

The following is the equilibrium diagram for two compounds A and B, each has a melting point of 80 °C. With reference to the diagram, what is the composition of the eutectic mixture? 80 °C 80 °C Liquid liquid + Asolid liquid + Bsolid 40 °C Eutectic point Asolid + Bsolid A B 50% 100

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter7: Equilibria In Multiple-component Systems

Section: Chapter Questions

Problem 7.34E

See similar textbooks

Similar questions

Consider this information regarding two compounds. Thallium azide: yellow crystalline solid; melting point = 330 C; slightly soluble in water, more soluble in hot water; insoluble in ethanol or diethyl ether. Camphene: colorless, cubic crystals; melting point = 51 C; boiling point = 159 C; insoluble in water; moderately soluble in ethanol; soluble in diethyl ether. (a) Is camphene an ionic or molecular compound? Explain your answer. (b) Is thallium azide an ionic or molecular compound? Explain your answer.
Explain and sketch the Born-Mayer equation to determine the crystallization energy of NaCl and MgCl2
Calculate the solubility of nitrogen in water at an atmospheric pressure of 0.500 atm (a typical value at high altitude). Atmospheric Gas Mole Fraction kH mol/(L*atm) N2 7.81 x 10-1 6.70 x 10-4 O2 2.10 x 10-1 1.30 x 10-3 Ar 9.34 x 10-3 1.40 x 10-3 CO2 3.33 x 10-4 3.50 x 10-2 CH4 2.00 x 10-6 1.40 x 10-3 H2 5.00 x 10-7 7.80 x 10-4 M
A small storage cabinet 2m x 2m x 3m contains an open 208 L drum of aqueous TEC at a concentration of 120 mg/L. The cabinet has been closed for over 2 months, so equilibrium conditions have been established. What is the TCE concentration in the water and vapor phases at this time? Assume that the temperature is 25 oC, R = 8.2 x 10-5 m3•atm/mole/K, and H = 0.0091 m3•atm/mole
(10) 6. A student was given a white solid for an unknown. Its melting point range was 78-81 °C. The student has previously worked with naphthalene and observed that it was a white crystalline solid with a melting point of 80.3 °C. (a) Can the student conclude that the unknown is naphthalene based on this information? Why or why not? (b) What additional experimental work should be done to verify this compound?
Define eutectic point. For a binary ( two.component ) mixture of solid organic compounds
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
A student obtained a solid product in a laboratory synthesis. To verify the identity of the solid, she measured its melting point and found that the material melted over a 12°C range. After it had cooled, she measured the melting point of the same sample again and found that this time the solid had a sharp melting point at the temperature that is characteristic of the desired product. Why were the two melting points different? What was responsible for the change in the melting point?
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.
Melting point of a compound is lowered when an impurity is introduced. However 1:1 mixture of A and B (benzene, mp = 5.5 °C and hexafluorobenzene, mp = 5.2 °C) leads to an elevation in melting point; the mixture melts at 23.7 °C. Provide explanation in case of impurity and 1:1 mixture of A and B. 8.
Which of the following statements are correct? Above the critical pressure, only the solid phase of a pure substance can exist. Above the critical temperature, a gas may not be condensed to a liquid. At the critical point, three phases (gas, liquid, and solid) may coexist at equilibrium II and III I and II II only I and III
When 2.62 g of the nonvolatile solid anthracene, C14H10,is dissolved in 100.0 g of cyclohexane, C6H12, the boilingpoint of the cyclohexane is raised by 0.41°C. Calculate Kbfor cyclohexane.