Name ______________________
date ____________
Period _______________
Intermolecular Forces Quiz
1. Explain the following using principles of intramolecular and intermolecular forces. Be sure to include details
regarding all species. The melting point of SiO2 is much higher than the melting point of CaCl2. (2)
2. A student is explaining the physical properties of two hydrocarbons at 760 torr and 25.0℃. glycerol, C3H8O3, is a
liquid and stearic acid, C18H38O2, is a liquid. The structural formulas are:
glycerol
stearic acid
a. The student claims that the difference is due to the greater number bonds that must be broken in
stearic acid. Explain why she is wrong. (2)
b. What intermolecular forces are present in these species? (2)
c. What is the correct explanation for the difference in the properties listed above? Discuss both species
and all relevant details. (4)
Name ______________________
date ____________
Period _______________
Intermolecular Forces Quiz
1. Explain the following using principles of intramolecular and intermolecular forces. Be sure to include details
regarding all species. The melting point of SiC is much higher than the melting point of NaCl. (2)
2. A student is explaining the physical properties of two hydrocarbons at 760 torr and 25.0℃. Propane, C3H8, is a
gas and octane, C8H18, is a liquid. The structural formulas are:
a. The student claims that the difference is due to the greater number bonds that must be broken in
octane. Explain why she is wrong. (2)
b. What intermolecular forces are present in these species? (2)
c. What is the correct explanation for the difference in the properties listed above? Discuss both species
and all relevant details. (4)