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I s it possible to carry out steam distillation at a temperature higher than 100C at 1 atm? Explain
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- Why is it important that the cooling waterbbin a distillation apparatus enter the condenser jacket at the lower end and exit at the upper end ,and not vice versa?Why would you not expect the saturation vapor pressure to fall zero, even at extremely low temperatures?TRUE OR FALSE: 1. Solids such as naphthalene when heated will pass thru a process called condensation prior to sublimation when being purified. 2.If water and n-propyl alcohol were mixed, the separation of individual components is possible with steam distillation because these two have a wide range of boiling point difference. 3. When an impurity in the synthesized camphor such as sodium chloride is present, the sublimation technique cannot be used to purify the camphor due to the nature of NaCl. 4. Organic solvents such as hexane or ether are an excellent medium to recrystallize an impure benzoic acid 5. In caffeine extraction, it is important that the tannic acid component of coffee be converted to its free acid state to avoid any interference with the extraction of caffeine
- Pressure was exerted with a piston on molten naphthalene at 95 °C. The vaporpressure of naphthalene when the applied pressure is 1.0 bar is 2.0 kPa. What is thevapor pressure when the pressure on the liquid is 15 MPa? The mass density ofnaphthalene at this temperature is 1.16 g cm-1.Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)Predict the temperature at which CuSO4·5H2O undergoes dehydration. CuSO4·5H2O (s) <=> CuSO4 (s) + 5H2O (g) ΔfHo -2280 -771 -242 kJ mol-1 Smo 300 109 189 J K-1 mol-1 T >= ______ K. 3 sig. fig.
- The Molecular Weight of an unknown liquid is determined using the Dumas Method. The following data has been obtained: Atmospheric Pressure = 754.6 TorrVolume of the Flask = 213 mLTemp. of Water Bath = 100 °CMass of Re-Condensed Liquid = 0.582 g What is the Molecular Weight of the liquid?solve as neatly as possible and show completesolution. Round your final answer to 4 decimal places and box / highlight all final answers. and all values must include proper units with proper conversion if needed in your solution. kindly folllow the format Given,Required,Solution subject physical chemistry 1. Calculate the mass of water vapor present in a room of volume 400 m3 thatcontains air at 290C when the relative humidity is 53.0%. Compute for the vaporpressure of water?True or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Explain why?
- Determine the molal analysis of the products of combustion when octane (C8H18) is burned with 200% theoretical air, and determine the dew point of the products if the pressure is 0.1 MPa.What gas law is applicable to the fractional distillation of ethanol-water mixture?You've just synthesized a new molecule and need to purify it by recrystallization. You find that it is poorly soluble in water and highly soluble in ethanol, even when cooled in ice. What solvent should work in this situation? a. water b. Recrystallization from any solvent is impossible. c. methanol d. a solvent mixture - water and ethanol