(20 points) The surface tension and viscosity values for diethyl ether, acetone, ethanol, and ethylene glycol are shown here. Compound diethyl ether C₂H5OC₂H5 acetone C₂H5OC₂H5 ethanol C₂H5OH ethylene glycol CH₂(OH)CH₂(OH) Molecule Surface Tension (mN/m) 17 23 22 48 Viscosity (mPa s) 0.22 0.31 1.07 16.1 (a) Explain their differences in viscosity in terms of the size and shape of their molecules and their intermolecular forces. (b) Explain their differences in surface tension in terms of the size and shape of their

(20 points) The surface tension and viscosity values for diethyl ether, acetone, ethanol, and ethylene glycol are shown here. Compound diethyl ether C₂H5OC₂H5 acetone C₂H5OC₂H5 ethanol C₂H5OH ethylene glycol CH₂(OH)CH₂(OH) Molecule Surface Tension (mN/m) 17 23 22 48 Viscosity (mPa s) 0.22 0.31 1.07 16.1 (a) Explain their differences in viscosity in terms of the size and shape of their molecules and their intermolecular forces. (b) Explain their differences in surface tension in terms of the size and shape of their

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600 500 400 300 200 octane acetylacetone orthoxylene 100. 100 110 120 130 140 temperature, °C Use the graph to answer the following questions: Which liquid is the most volatile? most volatile: choose one Which is the least volatile? least volatile: choose one O°c octane: What is the normal boiling point of each liquid? Note: your answer must be within 1°C of the exact answer to be graded correct. acetylacetone: orthoxylene: Suppose a beaker of acetylacetone is put inside a sealed tank containing acetylacetone gas at 119. degree C and 206. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount? more less the same vapor pressure, torr
How does the measure of the relative viscosity provide a measure of the transesterification process? Select one: The produced biodiesel has a much higher viscosity than the starting soybean oil. The produced glycerol binds with the produced FAMES, creating more viscous products. O As relative viscosity decreases, this indicates that the reaction is progressing as desired. The produced biodiesel has a much lower viscosity than the starting soybean oil.
(a) Would you expect the viscosity of n-pentane,CH3CH2CH2CH2CH3, to be larger or smaller than the viscosityof n-hexane, CH3CH2CH2CH2CH2CH3? (b) Wouldyou expect the viscosity of neopentane, (CH3)4C, to besmaller or larger than the viscosity of n-pentane? (See Figure11.6 to see the shapes of these molecules.)
This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600 500 400 300 - pyridine 200 octane 100 acetylacetone 0 100 110 120 130 140 temperature, °C Use the graph to answer the following questions: Which liquid is the most volatile? most volatile: choose one Which is the least volatile? least volatile: choose one pyridine: What is the normal boiling point of each liquid? Note: your answer must be within 1°C of the exact answer to be graded correct. octane: acetylacetone: more Suppose a beaker of octane is put inside a sealed tank containing octane gas at 123. degree C and 403. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount? less the same vapor pressure, torr
Determine the capillary rise (in cm) of a liquid using the following information: The inner diameter of the tube is 2.0 mm. The density and surface tension of the liquid are 1.2 g/cm³ and 0.048 kg/s², respectively. The contact angle between the liquid and the tube is 90 degrees.
cntical point 218 water ice P. 1. atm triple point 0.006 water he rg dang vapor 100 374 T°C In order to sublimate completely (and not melt), water has to O increase in pressure at a temperature below the triple point decrese in pressure at the exact temperature of the triple point increase in temperature at a pressure below the triple point decrease in temperature at a pressure below the triple point
Sam knows that he has one of 3 possible liquid unknowns: tetrahyrofuran (bp 65-67°C), ethyl acetate(bp 76-77°C), or toluene (bp 110-111°C). He sets up for a microscale bp determination and clamps thewhole shebang in a water bath. Fifteen minutes late the water is boiling like crazy, but he has yet tosee a single vapor bubble escape from the capillary tube. He double-checks his set-up and everythingis fine so now he’s totally confused. What must his unknown be and why? Break it to him gently…hedoesn’t want to feel like a total idiot.
Four liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution freezing point boiling point 6.4 g of glucose (C6H1206) dissolved in 300. mL of water (choose one) O (choose one) 6.4 g of potassium sulfate (K2SO4) dissolved in 300. mL of water (choose one) (choose one) O 6.4 g of sodium bromide (NaBr) dissolved in 300. mL of water (choose one) (choose one) O 300. mL of pure water (choose one) E (choose one) E