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CEM 141 Recitation Week 3.pdfCEM
141 Recitation
141 Recitation
Week 3.pdfCEM
Week 3.pdf######################################################
141 Recitation Week 3.pdf##################################
CEM 141 Recitation Week 3
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?
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 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?
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?
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
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?
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)?
##########################CEM
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141 Recitation Week 3.pdf###############################################################################
141 Recitation Week 3.pdfCEM 141 Recitation Week 3.pdf##################################
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141 Recitation Week 3.pdfCEM
141 Recitation
141 Recitation
Week 3.pdfCEM
Week 3.pdf######################################################
141 Recitation Week 3.pdf##################################
CEM 141 Recitation Week 3
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?
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 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?
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?
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
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?
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)?
##########################CEM
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141 Recitation Week 3.pdf###############################################################################
141 Recitation Week 3.pdfCEM 141 Recitation Week 3.pdf##################################
