Concept explainers
(a)
Interpretation:
Whether
Concept Introduction:
Intermolecular forces are forces that are responsible for interaction between molecules. Such forces include both attractive as well as repulsive forces.
Types of intermolecular forces:
1. Ion-dipole forces: These forces come into play when ions interact with polar molecules. Ion gets attracted to oppositely charged end of polar molecule.
2. Dipole-dipole forces: These forces arise when there is interaction between oppositely charged ends of different dipoles.
3. London forces: These forces exist when there is interaction between nonpolar molecules. There occurs distortion in symmetry of electron clouds when two nonpolar molecules come closer to each other. Such forces exist in all molecules and therefore London forces are called universal.
4. Hydrogen bonding: This intermolecular force exists when hydrogen atoms are connected to highly electronegative elements like
(b)
Interpretation:
Whether
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Whether
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
Whether
Concept Introduction:
Refer to part (a).
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ACHIEVE/CHEMICAL PRINCIPLES ACCESS 2TERM
- Examining the crystal structure of CsCl (Caesium Chloride), the Cs+ions form the 8 corners of a cube and the Cl−ion is a the center of the cube. From first-principles calculation, it was determined that the lattice constant of CsCl is 4.209 ̊A. (a) Calculate in detail the electrostatic force exerted by all the Cs+ atoms to the Cl−atom; (b) Assuming that 1 Cs+atom is missing in crystal structure (crystal is said to have a defect), calculate in detail what will be the net electrostatic force on the Cl−ion due to the remaining Cs+ions.arrow_forwardExplain each of these properties of water, and describe how each is conferred by the dipolar nature of a water molecule: high specific heat capacity; high heat of vaporization; unique density behavior; high surface tension; capacity to be a good solvent for ions of salts.arrow_forwardName the type(s) of intermolecular forces that exists between molecules (or basic units) in each of the following species: (a) LiF, (b) CH4, (c) SO2 (a) benzene (C6H6), (b) CH3Cl, (c) PF3, (d) NaCl, (e) CS2arrow_forward
- Name the type(s) of intermolecular forces that exists between molecules (or basic units) in each of the following species and identify the following species that are capable of hydrogen-bonding among themselves. (a) BeH2, (b) CH3COOHarrow_forwardExplain for these observations: (a) The surface tension of CHBr3 is greater than that of CHCl3. (b) As temperature increases, oil flows faster through a narrow tube. (c) Raindrops that collect on a waxed automobile hood take on a nearly spherical shape.arrow_forwardBased on the type or types of intermolecular forces, predictthe substance in each pair that has the higher boiling point:(a) propane (C3H8) or n-butane (C4H10), (b) diethyl ether(CH3CH2OCH2CH3) or 1-butanol (CH3CH2CH2CH2OH),(c) sulfur dioxide (SO2) or sulfur trioxide (SO3), (d) phosgene(Cl2CO) or formaldehyde (H2CO).arrow_forward
- NaH crystallizes with the same crystal structure as NaCl. The edge length of the cubic unit cell of NaH is 4.880 Å.(a) Calculate the ionic radius of H−. (The ionic radius of Li+ is 0.0.95 Å.)(b) Calculate the density of NaH.arrow_forward(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules begin to flow? (b) Consider a substance where the intermolecular forces hold the molecules in close contact with each other, but the molecules can flow. What is the process called when enough heat has been added to the substance so that the molecules escape each other? (c) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules can escape each other?arrow_forwardName the type(s) of intermolecular forces that exists between molecules (or basic units) in each of the following species and identify the following species that are capable of hydrogen-bonding among themselves. (a) C2H6, (b) HI, (c) KF, (d) BeH2, (e) CH3COOHarrow_forward
- Identify the principal intermolecular forces in each of the following compounds: NOCl, NH 2 Cl , SiCl 4 .arrow_forward7. (a) What effect do the polarity, size, and shape of a molecule have on the physical properties of the molecule? (b) How do these factors influence intermolecular forces? K/UT/Iarrow_forwardName the type(s) of intermolecular forces that exists between molecules (or basic units) in each of the following species: (a) NaCL (b) CS2arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning