Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an assumption for the vapor of the volatile sample ii. The sample must be a volatile liquid with a boiling point above 25°C and below 100°C using similar method ii. Possibility of having Impurities may not cause discrepancies of the result only i and i are the limitations All are Method's limitation O only i is the limitation O only i and ii are the limitations
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- Crude oil containing 5.0 mole per cent of gasoline is stripped by running the crude down a columnup which live steam is passed so that 15 kmol of steam are used/100 kmol of oil stripped. Determinethe number of theoretical plates required to reduce the gasoline content to 0.05 mole per cent, assumingthat the crude oil is non-volatile. The vapor–liquid relation of the gasoline in the oil is given by ye = 44x,where ye is the mole fraction in the vapor and x the mole fraction in the liquid. The temperature ismaintained constant by internal heating so that steam does not condense in the tower.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.A liquid-vapour mixture whose composition is 60 mole % of benzene is contained within a vessel at 60C. What fraction of moles are both methanol and in the liquid phase?
- Steam pressures for pure CCl4 and SiCl4 are given as 0.4226 bar and 0.7999 bar respectively, while the temperature is 50°C. For a mixture prepared with these two liquids and boiling at 50°C under a pressure of 0.5333 bar, find the composition of the phases as a mole fraction and a mass fraction. [M(CCl4):153,82 g/mol, M(SiCl4):169,9 g/mol]The table below shows temperature/composition data collected for a mixture of methylbenzene (M) and octane (O) at 1 atm. Recall that x stands for the mole fraction in the liquid and y stands for the mole fraction in the vapor in equilibrium. The boiling points for methylbenzene (M) and octane (O) are 110.60C and 125.60C, respectively. Construct the phase diagram with Temperature vs. xM. What is the composition of the vapor in equilibrium with the liquid of composition (a) xM = 0.250 and (b) xO = 0.250. T (0C) 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0 xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097 yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.1641 At a temperature of 302.8 K, mixtures of phenol andwater exist as two separate phases with mole fractionsof phenol of 0.30 and 0.93. Use the lever rule to determine the relative amounts of the two phases for amixture w ith an overall mole fraction of phenol of 0.45.
- Crude oil containing 5.0 mole per cent of gasoline is stripped by running the crude down a columnup which live steam is passed, so that 15 kmol of steam are used/100 kmol of oil stripped. Determinethe number of theoretical plates required to reduce the gasoline content to 0.05 mole per cent, assumingthat the crude oil is non-volatile. The vapour–liquid relation of the gasoline in the oil is given by ye = 44x,where ye is the mole fraction in the vapour and x the mole fraction in the liquid. The temperature ismaintained constant by internal heating, so that steam does not condense in the tower.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.A liquid mixture of 50% mole n-butane and 50% mole n-pentane at 60oC and brought to a total pressure of 2600 mm Hg. At equilibrium, find the composition of both the liquid and vapor phases. What fraction of the original liquid was vaporized? If the mixture is heated further to 80°C what is the resulting pressure?
- For a given liquid a plot of the lnP versus 1/T gives a straight line with a slope of -2829 K.What is the ΔHvap of this liquid? Your answer should be in kJ/mol and have 3 sig figsA mixture of phenol and water, under certain conditions of temperature and composition, forms two separate liquid phases, one rich in phenol and the other rich in water. At 30⁰ the compositions of the upper and lower layers are 70% and 9% by mass phenol, respectively. If 40kg of phenol and 60kg of water are mixed and the layers are allowed to separate at 30⁰C, what will be the weight of the two layers?Determine the following from the Txy diagram of a two-component (A and B) solid-liquid system: Composition of the eutectic mixture Consider a mixture with overall B composition of 0.57. What is the ratio of the amount of solid containing 0.67 B and 0.33 A to the amount of the eutectic mixture at the eutectic temperature? 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 to answer this)