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The diagram below shows liquids can interact with flat surfaces just as it can with capillary tubes.    (a) In which of these diagrams, i or ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? (b) Which of these diagrams, i or ii, represents what happens when water is on a nonpolar surface? (c) Which of these diagrams, i or ii, represents what happens when water is on a polar surface?

The diagram below shows liquids can interact with flat surfaces just as it can with capillary tubes.    (a) In which of these diagrams, i or ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? (b) Which of these diagrams, i or ii, represents what happens when water is on a nonpolar surface? (c) Which of these diagrams, i or ii, represents what happens when water is on a polar surface?

Chemistry
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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The diagram below shows liquids can interact with flat surfaces just as it can with capillary tubes. 

 

(a) In which of these diagrams, i or ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? (b) Which of these diagrams, i or ii, represents what happens when water is on a nonpolar surface? (c) Which of these diagrams, i or ii, represents what happens when water is on a polar surface?

2 Pearson.Chemistry. The.Central.Science.in.SI.Units.Global.Edition.14th.Edition.B07644QFFC.pdf.pdf - Adobe Reader File Edit View Window Help Оpen 510 (512 of 1252) 114% Tools Fill & Sign Comment At least one signature has problems. A Signature Panel v Fill & Sign Tools T Add Text 510 CHAPTER 11 Liquids and Intermolecular Forces V Add Checkmark Phase Changes (Section 11.4) LM Place Initials 11.39 Name the phase transition in each of the following situa- tions and indicate whether it is exothermic or endothermic: (a) Ice-cream melts at room temperature. (b) Potato slices become crisp when fried. (c) Droplets of water appear on the lid of a food container containing freshly baked bread. (d) You can see your own breath on a cold day. L Place Signature • Send or Collect Signatures • Work with Certificates 11.40 Name the phase transition in each of the following situa- tions and indicate whether it is exothermic or endother- mic: (a) Iodine solid turns to iodine gas when it is heated. (b) Snowflakes turn into water when they fall on an open palm. (c) Droplets of water appear on grass in a cold humid morning. (d) Dry ice gradually disappears when left at room temperature for some period of time. (i) 11.41 (a) What phase change is represented by the “heat of vapor- ization" of a substance? (b) Is the process of vaporization endothermic or exothermic? (c) If you compare a sub- stance's heat of vaporization to the amount of heat released during condensation, which one is generally larger (con- sider the numerical value only)? 11.42 Ethyl chloride (C,H,Cl) boils at 12°C. When liquid C,H3CI (ii) under pressure is sprayed on a room-temperature (25 °C) surface in air, the surface is cooled considerably. (a) What does this observation tell us about the specific heat of C,H5C1(g) as compared with that of C,H;Cl(1)? (b) Assume that the heat lost by the surface is gained by ethyl chloride. What enthalpies must you consider if you were to calculate the final temperature of the surface? (a) In which of these diagrams, ior ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? (b) Which of these diagrams, i or ii, rep- resents what happens when water is on a nonpolar surface? (c) Which of these diagrams, i or ii, represents what hap- pens when water is on a polar surface? 11.43 For many years drinking water has been cooled in hot cli- 11.36 Hydrazine (HaNNHa), hydrogen peroxide (HOOH), and
Transcribed Image Text:2 Pearson.Chemistry. The.Central.Science.in.SI.Units.Global.Edition.14th.Edition.B07644QFFC.pdf.pdf - Adobe Reader File Edit View Window Help Оpen 510 (512 of 1252) 114% Tools Fill & Sign Comment At least one signature has problems. A Signature Panel v Fill & Sign Tools T Add Text 510 CHAPTER 11 Liquids and Intermolecular Forces V Add Checkmark Phase Changes (Section 11.4) LM Place Initials 11.39 Name the phase transition in each of the following situa- tions and indicate whether it is exothermic or endothermic: (a) Ice-cream melts at room temperature. (b) Potato slices become crisp when fried. (c) Droplets of water appear on the lid of a food container containing freshly baked bread. (d) You can see your own breath on a cold day. L Place Signature • Send or Collect Signatures • Work with Certificates 11.40 Name the phase transition in each of the following situa- tions and indicate whether it is exothermic or endother- mic: (a) Iodine solid turns to iodine gas when it is heated. (b) Snowflakes turn into water when they fall on an open palm. (c) Droplets of water appear on grass in a cold humid morning. (d) Dry ice gradually disappears when left at room temperature for some period of time. (i) 11.41 (a) What phase change is represented by the “heat of vapor- ization" of a substance? (b) Is the process of vaporization endothermic or exothermic? (c) If you compare a sub- stance's heat of vaporization to the amount of heat released during condensation, which one is generally larger (con- sider the numerical value only)? 11.42 Ethyl chloride (C,H,Cl) boils at 12°C. When liquid C,H3CI (ii) under pressure is sprayed on a room-temperature (25 °C) surface in air, the surface is cooled considerably. (a) What does this observation tell us about the specific heat of C,H5C1(g) as compared with that of C,H;Cl(1)? (b) Assume that the heat lost by the surface is gained by ethyl chloride. What enthalpies must you consider if you were to calculate the final temperature of the surface? (a) In which of these diagrams, ior ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? (b) Which of these diagrams, i or ii, rep- resents what happens when water is on a nonpolar surface? (c) Which of these diagrams, i or ii, represents what hap- pens when water is on a polar surface? 11.43 For many years drinking water has been cooled in hot cli- 11.36 Hydrazine (HaNNHa), hydrogen peroxide (HOOH), and
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