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Magnesium oxide and nickel oxide withstand high temperatures. However, they do melt when the temperature is high enough and the behavior of mixtures of the two is of considerable interest to the ceramics industry. Draw the temperature composition diagram for the system using the data below, where x is the mole fraction of MgO in the solid and y its mole fraction in the liquid. /C 1960 2200 2400 2600 2800 x 0 0.35 0.60 0.83 1.00 y 0 0.18 0.38 0.65 1.00 State (a) the melting point of a mixture with x = 0.30, (b) the composition and proportion of the phases present when a solid of composition x = 0.30 is heated to 2200C, (c) the temperature at which a liquid of composition y = 0.70 will begin to solidify
I-Butanol and chlorobenzene form a minimum-boiling azeotropic system. The mole fraction of I-butanol in the liquid (x) and vapour (y) phases at 1.000 atm is given below for a variety of boiling temperatures (H. Artigas, C.
Lafuente, P. Cea, F.M. Royo, and J.S. Urieta,J. Chem. Eng. Data 42,132 (1997))
T/K 396.57 393.94 391.60 390.15 389.03 388.66 388.57
X 0.1065 0.1700 0.2646 0.3687 0.5017 0.6091 0.7171
Y 0.2859 0.3691 0.4505 0.5138 0.5840 0.6409 0.7070
Pure chlorobenzene boils at 404.86 K.
(a) Construct the chlorobenzene-rich portion of the phase diagram from the data.
(b) Estimate the temperature at which a solution whose mole fraction of I-butanol is 0.300 begins to boil.
(c) State the compositions and relative proportions of the two phases present after a solution initially 0.300 l-butanol is heated to 393.94 K
A mixture of 50 g of hexane (0.59 mol C6H14) and 100 g of nitrobenzene (0.82 mol C6H5NO2) was prepared at 273 K.
i. What are the compositions of the phases?
ii. in what proportions do they occur?
iii. To what temperature must the sample be heated in order to obtain a single-phase?
What factors determine the number of theoretical plates required to achieve the desired degree of separation in fractional distillation?
A chemist adds 150.0 mL of a 6.84 g/dL sodium chloride (NaCI) solution to a flask. Calculate the mass in grams of sodium chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.
how many grams are in 1.89 mol of CO2?
175 grams of hot aluminum at 100.0ºC is dropped into an insulated cup that contains 40.0 mL of ice cold water at 0.00ºC (all liquid). Find the final temperature after they reach thermal equilibrium. The specific heat of Al = 0.900 J/gºC.
which basic quantities are useful in defining the derived physical quantities
A sample of sulphur trioxide gas was heated to decompose at a constant volume to attain equilibrium. 2SO3 (g) ⇌ 2SO2 (g) + O2 (g). The pressure of the equilibrium mixture changes by 30%. What is the mole fraction of the oxygen formed?
2)Write the equilibrium expression (K) for:
a)4NH3(g) + 5O2(g) ⇌ 4 NO(g) + 6H2(g)
b)Ag2CO3(s) +H2O ⇌ 2 Ag (aq) + CO3(aq)
I need help with this
