As the valence charge cloud gets larger, would it be easier/harder for an extra electron to move to one side of the atom, thus giving the particle a temporary dipole moment? Molecules with larger electron clouds have more electrons, which are generally more loosely held because the size of the electron cloud is larger. This makes their electron clouds more deformable from nearby charges, a characteristic called "polarizability". As a result, substances with higher molecular weights have higher London dispersion forces and consequently tend to have higher melting points and boiling points. a. Draw a graph showing the change in potential energy as two atoms of helium get closer to each other. Label the position where the atoms are most stable. Explain why the potential energy changes (either increases or decreases) as the two atoms approach.

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter7: Chemical Bonding And Molecular Structure
Section: Chapter Questions
Problem 7.30PAE: 7.30 The bond in HF is said to be polar, with the hydrogen carrying a partial positive charge. For...
icon
Related questions
icon
Concept explainers
Question

Please help answer a,b,c and d

As the valence charge cloud gets larger, would it be easier /harder for an extra electron to
move to one side of the atom, thus giving the particle a temporary dipole moment?
Molecules with larger electron clouds have more electrons, which are generally more
loosely held because the size of the electron cloud is larger. This makes their electron
clouds more deformable from nearby charges, a characteristic called "polarizability". As a
result, substances with higher molecular weights have higher London dispersion forces and
consequently tend to have higher melting points and boiling points.
a. Draw a graph showing the change in potential energy as two atoms of helium get closer
to each other. Label the position where the atoms are most stable. Explain why the
potential energy changes (either increases or decreases) as the two atoms approach.
b. Now using a dotted line draw a similar curve – on the same set of axes. Show the
change in potential energy when two xenon atoms approach each other.
c. Compare the energy changes and position of greatest stability for xenon to the curve
you drew for helium. Explain why they are different
d. List any differences between the two potential energy curves of the two substances.
Be sure to explain WHY those differences exist (hint: think about what the X and Y
axes represent and what conclusions you can draw from that).
Transcribed Image Text:As the valence charge cloud gets larger, would it be easier /harder for an extra electron to move to one side of the atom, thus giving the particle a temporary dipole moment? Molecules with larger electron clouds have more electrons, which are generally more loosely held because the size of the electron cloud is larger. This makes their electron clouds more deformable from nearby charges, a characteristic called "polarizability". As a result, substances with higher molecular weights have higher London dispersion forces and consequently tend to have higher melting points and boiling points. a. Draw a graph showing the change in potential energy as two atoms of helium get closer to each other. Label the position where the atoms are most stable. Explain why the potential energy changes (either increases or decreases) as the two atoms approach. b. Now using a dotted line draw a similar curve – on the same set of axes. Show the change in potential energy when two xenon atoms approach each other. c. Compare the energy changes and position of greatest stability for xenon to the curve you drew for helium. Explain why they are different d. List any differences between the two potential energy curves of the two substances. Be sure to explain WHY those differences exist (hint: think about what the X and Y axes represent and what conclusions you can draw from that).
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 6 steps with 1 images

Blurred answer
Knowledge Booster
Electronic Effects
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry for Engineering Students
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: The Molecular Science
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
Chemistry: Principles and Practice
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning
Principles of Modern Chemistry
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning