10/14/2014
ALEKS Alex H. Yuan - 10/14/2014 11:12:20 PM EDT - Copyright © 2014 UC Regents and ALEKS Corporation
Alex H. Yuan - 10/14/2014 11:12:20 PM EDT
General Chemistry (First Semester) / Chem 110 FA 2014 – CH110 FA14 S25-36 (Dr.
Barber)
1.
Identifying the important intermolecular forces in pure compounds
Decide which intermolecular forces act between the molecules of each compound in the
table below.
intermolecular forces
(check all that apply)
compound
dispersion
dipole
hydrogen-bonding
nitrogen trichloride
O2
oxygen
ammonia
nitrogen tribromide
Different types of molecules feel different types of intermolecular force:
intermolecular
force
dispersion
dipole
hydrogenbonding
molecules that feel it
All molecules.
Only polar molecules.
Only molecules that can form the special three-atom
hydrogen-bonding interaction.
You can use this chart to solve the problem:
Since the dispersion force acts between any two molecules, you should check the
"dispersion" box for all four substances.
https://secure.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNsIkr7j8P3jH-lJiYsPgPQIfQokR4hWMNIe-wKsFh3XosSqEPK1XBj5Njw-ANDalASn3Fa7Y3FEgQhu…
1/2
10/14/2014
ALEKS Alex H. Yuan - 10/14/2014 11:12:20 PM EDT - Copyright © 2014 UC Regents and ALEKS Corporation
Since ammonia
nitrogen trichloride
and nitrogen tribromide
are made of polar molecules, you should check the "dipole" box next to them.
Since ammonia
is made from molecules that can form a hydrogen-bonding
arrangement with each other, you should check the "hydrogen-bonding" box next to
it.
The hydrogen-bonding arrangement two
molecules can form.
intermolecular forces
(check all that apply)
compound
dispersion
dipole
hydrogen-bonding
nitrogen trichloride
O2
oxygen
ammonia
nitrogen tribromide
Copyright © 2014 UC Regents and ALEKS Corporation
https://secure.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNsIkr7j8P3jH-lJiYsPgPQIfQokR4hWMNIe-wKsFh3XosSqEPK1XBj5Njw-ANDalASn3Fa7Y3FEgQhu…
2/2