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- Part 1: The structures of carbon disulfide and carbon dioxide are shown below with their boiling points. Explain why CS2 has a higher boiling point than CO2. Be specific about particulate interactions and intermolecular forces. IMG 2217 Part 2: Below are the structures of water and octane (C8H18), along with their boiling points. Water has a lower boiling point than octane! Explain why, being specific about the particulate-level interactions and intermolecular forces. (Remember, each point on a line is a carbon surrounded with the appropriate number of hydrogen atoms to make an octet). IMG 2218When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH ), the freezing point of the solution is measured to be 1.7 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. Ox10 미Heating a solid until it passes directly from the solid phase into the gaseous phase. Separating a liquid from an insoluble solid sediment by carefully pouring the liquid from the solid without disturbing the solid. The process of vapor returning to the solid phase without a liquid phase in between. Heating a mixture to vaporize a volatile liquid component to make the remaining component dry. Separating a solid from a liquid using a porous material, such as paper, charcoal, or sand, as a filter. Using a solvent to selectively dissolve one or more components from a solid mixture. Answer Bank extraction filtration decantation deposition sublimation evaporation
- Q2) 90 proof bourbon is 45% ethanol (CH,CH2OH). Determine each of the following for this material. You may need to know that the density of this bourbon is 0.9227 g/ml (1), pure ethanol is 0.7893 g/mL (2), and water (assume the rest is just water) is 1.00 g/mL. a) What is the mole fraction ethanol? b) What is the molarity of the ethanol? c) What is the molality of the ethanol? Q3) Exercise #23 from your text has CO2 in a drink at 0.10 M concentration but only under high pressure. When you open a can, the pressure drops to 1.0 atm. How much (moles) CO, is released from the can when it is opened? [Note: think about how #23 was solved and then do that again for the changed question here. The difference should give you your answer..] Q4) Assuming ideal solution behavior, what is the boiling point of a solution of the sugar solution in Q1 above? [You will need table 11.2 from the text for this)Near room temperature and pressure, ethylbenzene and benzeneare miscible liquids. Assume a mixture of ethylbenzene and benzene behaves as an ideal solution. a) How reasonable is it to assume that such a mixture behaves ideally?133 - 107 ethyl ether ethyl alcohol 80 53 water 27 ' ethylene glycol 20 40 60 80 100 120 Temperature (°C) University of Wisconsin, https://wisc.pb.unizin.org/minimisgenchem/chapter/vapor-pressure- m10q3/ Reference the vapor pressure diagram above with the table below, which provides the chemical formulas for the four substances: Substance Name Chemical Formula Water H20 Ethyl ether (CH3CH2)20 Ethylene glycol (CH2OH)2 Pressure (kPa)
- Table of Physical Constant Substance Molecular Weight (g/mol) Density g/mL Melting point and Boiling point 0C Solubility Benzoic Acid Cellulose CaffeineConsider 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.In the process of distillation of a mixture of acetone and water, how does the composition of the first vapor produced compare with that of the original mixture?
