11.39 Name the phase transition in each of the following situations and indicate whether it is exothermic or endo-thermic: (a) When ice is heated, it turns to water. (b) Wetclothes dry on a warm summer day. (c) Frost appears on awindow on a cold winter day. (d) Droplets of water appearon a cold glass of lemonade.oncition in each of the followine

The phase transitions in each situation is determined as follows,(a)Here, ice in solid phase gets…

Answered: 11.39 Name the phase transition in each…

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 94E: Diethyl ether (CH3CH2OCH2CH3) was one of the first chemicals used as an anesthetic. At 34.6C,...

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Chloroform, CHCl3, has a normal boiling point of 61C. Its vapor pressure at 43C is 0.526 atm. What is the concentration (in g/L) of CHCl3 when it saturates the air at 27C?
Diethyl ether (CH3CH2OCH2CH3) was one of the first chemicals used as an anesthetic. At 34.6C, diethyl ether has a vapor pressure of 760. torr, and at 17.9C, it has a vapor pressure of 400. torr. What is the H of vaporization for diethyl ether?
Pentane C5H12 boils at 360C at 1 atmosphere pressure. What is the molar heat of vaporization in kJ/mol if the vapor pressure of pentane at 250C is 505 torr?
The molar heat of vaporization of ammonia is 23.3 kJ/mol. What is themolar heat of condensation of ammonia?
At three different temperatures, T1, T2, and T3, the moleculesin a liquid crystal align in these ways: (a) At which temperature or temperatures is the substancein a liquid crystalline state? At those temperatures, whichtype of liquid crystalline phase is depicted? (b) Which is thehighest of these three temperatures?
The normal boiling point of unobtainium is 345 C. a. Is the condensation of unobtainium endo or exo thermic?b. At what temperature(s) , if any, is condensation unobtainium nonspontaneous?c. Is there a temperature at which liquid and gaseous unobtainium are in equilibrium?
List the following substances in order of decreasing boiling point:CO2, Ne, CH3OH, KF Rank substances from the highest boiling point to the lowest one. To rank substances as equivalent, overlap them.
Hydrogen peroxide (H2O2) is a major industrial chemicalthat is produced on a scale approaching 109 kg per year. Itis widely used as a bleach and in chemical manufacturingprocesses. How do you expect its boiling point to comparewith those of fluorine (F2) and hydrogen sulfide (H2S), twosubstances with molar masses comparable with that ofhydrogen peroxide?
Ethylene glycol 1HOCH2CH2OH2, the major substance inantifreeze, has a normal boiling point of 198 °C. Bycomparison, ethyl alcohol 1CH3CH2OH2 boils at 78 °Cat atmospheric pressure. Ethylene glycol dimethyl ether1CH3OCH2CH2OCH32 has a normal boiling point of 83 °C,and ethyl methyl ether 1CH3CH2OCH32 has a normalboiling point of 11 °C. (a) Explain why replacement of ahydrogen on the oxygen by a CH3 group generally resultsin a lower boiling point. (b) What are the major factorsresponsible for the difference in boiling points of the twoethers?
Dry ice, CO2(s), does not melt at atmospheric pressure. It sublimes at a temperature of −78 °C. What is the lowest pressure at which CO2(s) will melt to give CO2(l)? At approximately what temperature will this occur? (Seeas shown for the phase diagram.)
4- Consider the phase diagram given below. What phases are present at points A through H? Identify the triple point, normal boiling point, normal freezing point, and critical point. Which phase is denser, solid, or liquid?
Ethylene glycol (HOCH2CH2OH), the major substance inantifreeze, has a normal boiling point of 198 °C. Bycomparison, ethyl alcohol (CH3CH2OH) boils at 78 °Cat atmospheric pressure. Ethylene glycol dimethyl ether(CH3OCH2CH2OCH3) has a normal boiling point of 83 °C, and ethyl methyl ether (CH3CH2OCH3) has a normalboiling point of 11 °C. (a) Explain why replacement of ahydrogen on the oxygen by a CH3 group generally resultsin a lower boiling point. (b) What are the major factorsresponsible for the difference in boiling points of the twoethers?

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