Chemistry & Chemical Reactivity, Hybrid Edition (with OWLv2 24-Months Printed Access Card)
9th Edition
ISBN: 9781285462530
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Question
Chapter 11, Problem 59SCQ
Interpretation Introduction
Interpretation:
Relation between boiling point and branched chain hydrocarbon has to be explained.
Concept Introduction: If intermolecular force is small the vapor pressure of the substance is high and the boiling point will be low.
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the external pressure.
The more the branching in the hydrocarbon, the lower is the boiling point.
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Students have asked these similar questions
Compare the boiling points of the various isomeric hydrocarbons shown in the table below. Notice the relationship between boiling point and structure; branched-chain
hydrocarbons have lower boiling points than the unbranched isomer. Speculate on possible reasons for this trend. Why might the intermolecular forces be slightly
different in these compounds?
Compound Boiling Point (°C)
68.9
Hexane
3-Methylpentane
2-Methylpentane
2,3-
Dimethylbutane
2,2-
Dimethylbutane
63.2
60.3
58.0
49.7
The more branched structure has smaller exposed surface and hence weaker dispersion intermolecular forces.
The more branched structure has larger exposed surface and hence weaker dispersion intermolecular forces.
The more branched structure has larger exposed surface and hence stronger dispersion intermolecular forces.
The more branched structure has smaller exposed surface and hence stronger dispersion intermolecular forces.
Discuss the different types of intermolecular forces that exist between
molecules. Give an example of how intermolecular forces can affect the thermodynamic
properties of fluids. Be specific and name the chemical compounds.
Hydrogen peroxide is a liquid at room temperature with a boiling point of 150°C, whereas
ethyne is a gas at room temperature with a boiling point of -84°C. Draw the molecules.
Based on intermolecular forces, explain this difference in physical properties of these
compounds that have similar chemical formulas and molar masses.
Chapter 11 Solutions
Chemistry & Chemical Reactivity, Hybrid Edition (with OWLv2 24-Months Printed Access Card)
Ch. 11.2 - Which should have the more negative hydration...Ch. 11.2 - Prob. 1RCCh. 11.3 - Using structural formulas, describe the hydrogen...Ch. 11.3 - Prob. 1RCCh. 11.3 - Prob. 2RCCh. 11.4 - Prob. 1CYUCh. 11.4 - Prob. 1RCCh. 11.4 - Prob. 2RCCh. 11.5 - Prob. 1CYUCh. 11.5 - 1. What type of intermolecular forces is likely to...
Ch. 11.6 - The molar enthalpy of vaporization of methanol,...Ch. 11.6 - Prob. 2CYUCh. 11.6 - Prob. 1RCCh. 11.6 - Prob. 2RCCh. 11.6 - Prob. 3RCCh. 11.6 - Prob. 1QCh. 11.6 - Prob. 2QCh. 11.A - Prob. 1QCh. 11.A - Prob. 2QCh. 11 - Prob. 1PSCh. 11 - Intermolecular forces: What type of forces must be...Ch. 11 - Prob. 3PSCh. 11 - Prob. 4PSCh. 11 - Considering intermolecular forces in the pure...Ch. 11 - Considering intermolecular forces in the pure...Ch. 11 - Prob. 7PSCh. 11 - Which of the following compounds would be expected...Ch. 11 - Prob. 9PSCh. 11 - When salts of Mg2+, Na+, and Cs+ are placed in...Ch. 11 - Prob. 11PSCh. 11 - The enthalpy of vaporization of liquid mercury is...Ch. 11 - Answer the following questions using Figure 11.12:...Ch. 11 - Answer the following questions using Figure 11.12:...Ch. 11 - Prob. 15PSCh. 11 - Refer to Figure 11.12 to answer these questions:...Ch. 11 - Which member of each of the following pairs of...Ch. 11 - Place the following four compounds in order of...Ch. 11 - Prob. 19PSCh. 11 - You are comparing three different substances, A,...Ch. 11 - Equilibrium vapor pressures of benzene, C6H6, at...Ch. 11 - Prob. 22PSCh. 11 - Can carbon monoxide (Tc = 132.9 K; Pc = 34.5 atm...Ch. 11 - Methane (CH4) cannot be liquefied at room...Ch. 11 - What is surface tension? Give an example...Ch. 11 - What factors affect the viscosity of a substance?...Ch. 11 - If a piece of filter paper (an absorbent paper...Ch. 11 - When water is placed in a buret it forms a concave...Ch. 11 - Prob. 29GQCh. 11 - What types of intermolecular forces are important...Ch. 11 - Which of the following salts, Li2SO4 or Cs2SO4, is...Ch. 11 - Prob. 32GQCh. 11 - Prob. 33GQCh. 11 - Prob. 34GQCh. 11 - Rank the following compounds in order of...Ch. 11 - Prob. 36GQCh. 11 - Prob. 37GQCh. 11 - The following data are the equilibrium vapor...Ch. 11 - Prob. 39ILCh. 11 - A hand boiler can be purchased in toy stores or at...Ch. 11 - Prob. 41ILCh. 11 - Prob. 42ILCh. 11 - Acetone, CH3COCH3, is a common laboratory solvent....Ch. 11 - Cooking oil floats on top of water. From this...Ch. 11 - Liquid ethylene glycol, HOCH2CH2OH, is one of the...Ch. 11 - Liquid methanol, CH3OH, is placed in a glass tube....Ch. 11 - Account for these facts: (a) Although ethanol...Ch. 11 - Prob. 48SCQCh. 11 - Prob. 49SCQCh. 11 - Prob. 50SCQCh. 11 - Prob. 51SCQCh. 11 - Prob. 52SCQCh. 11 - A fluorocarbon, CF4, has a critical temperature of...Ch. 11 - Prob. 55SCQCh. 11 - List four properties of liquids that are directly...Ch. 11 - List the following ions in order of hydration...Ch. 11 - Prob. 59SCQCh. 11 - An 8.82-g sample of Br2 is placed in an evacuated...Ch. 11 - Polarizability is defined as the extent to which...Ch. 11 - Prob. 62SCQCh. 11 - A pressure cooker (a kitchen appliance) is a pot...Ch. 11 - Vapor pressures of NH3() at several temperatures...Ch. 11 - Prob. 65SCQCh. 11 - Prob. 66SCQCh. 11 - Prob. 67SCQ
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