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CEM 141 Recitation Week 3 Questions & 100% Verified Correct Answers with complete solutions (Latest update $7.99   Add to cart
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CEM 141 Recitation Week 3 Questions & 100% Verified Correct Answers with complete solutions (Latest update

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CEM 141 Recitation Week 3 Questions & 100% Verified Correct Answers with complete solutions (Latest update

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  • August 15, 2024
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  • 2024/2025
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  • cem 141 recitation week 3

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CEM 141 Recitation Week 3
the electrostatic repulsion between e- means that the atoms are forced apart, since energy was
used to "push" e- together (in the form of KE) this energy must be stored in the electrostatic field
as PE - ANS-as atoms get closer together and their e- clouds overlap, why does PE rise?

the strength of the attractive forces = the strength of repulsive forces (allows stable interaction to
occur) - ANS-what forces are present/respective strengths at potential minimum?

the deeper the well, the more energy needed to separate the atoms (deeper well = stronger
interaction) - ANS-what info does the depth of the potential well tell you about the strength of the
interaction?

you can determine the distance between the nuclei when atoms are most stable - ANS-what
info can you get from the position of the potential minimum along the x-axis (distance between
atomic nuclei)?

Xe has more e-, so it has stronger LDFs - ANS-why is the potential energy well deeper for Xe
rather than Ne?

Xe is a bigger atom (more e- = larger e- cloud) - ANS-why does the potential well for Xe have a
longer distance between nuclei than Ne?

we have to add energy so the forces holding the atoms in place are overcome and atoms can
move relative to eachother - ANS-why do you need to add energy to change a solid to a liquid?

the stronger attraction between particles the more energy is needed to overcome the attraction -
ANS-what is the relationship between strength of an interaction and boiling point?

Xe has a higher melting point (and BP) than Ne bc it has stronger LDFs due to larger distortion
of larger e- clouds around each Xe, bc of this Xe atoms are more attracted to each other so they
require more energy (and a higher temp) so they can seperate - ANS-explain the relative
melting points of Ne and Xe

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