UNE - Chem 1011 - Midterm Study Guide
Questions With Correct Answers
A hydrogen bond is characterized by
| | | | |
A. the attraction of temporary dipoles produced by the random
| | | | | | | | | |
asymmetries in electron motion | | |
B. the electrostatic attraction between the permanent dipoles in any
| | | | | | | | | |
polar molecule |
C. the highly concentrated partial charge between an H atom and F, O,
| | | | | | | | | | | | |
or N atoms
| |
D. the covalent sharing of electrons between two atoms in a molecule
| | | | | | | | | | |
C. the highly concentrated partial charge between an H atom and F, O,
| | | | | | | | | | | | |
or N atoms
| |
(Ref: Week 1 Quiz)
| | |
,A. LDF's
| |
B. Dipole-Dipole
|
D. Covalent Bond
| |
Which of the following will have the strongest dipole-dipole attractions?
| | | | | | | | |
A. NCl3
|
B. CCl4
|
C. BCl3
|
D. Cl2
|
A. NCl3
| |
(Ref: Week 1 Quiz)
| | |
,Asymmetrical - Usually have a higher dipole moment
| | | | | | |
Why not BCl3? Because Nitrogen is more electronegative than Boron.
| | | | | | | | |
A cohesive force
| |
A. is the result of the intermolecular forces that attract identical
| | | | | | | | | | |
molecules
B. is the result of the intermolecular forces that attract different
| | | | | | | | | | |
molecules together |
C. is the result of covalent interactions between atoms in a molecule
| | | | | | | | | | |
D. is always stronger than an adhesive force
| | | | | | |
A. is the result of the intermolecular forces that attract identical
| | | | | | | | | | |
molecules
, (Ref: Week 1 Quiz)
| | |
Easy way to remember. Co = mutual so cohesive is identical molecules.
| | | | | | | | | | |
ΔHvap is |
A. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the gas phase
| | |
B. the energy change when a substance changes from the solid phase to
| | | | | | | | | | | |
the liquid phase
| | |
C. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the solid phase
| | |
D. the energy change when a substance changes from the solid phase
| | | | | | | | | | | |
directly to the gas phase
| | | |
A. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the gas phase
| | |
Questions With Correct Answers
A hydrogen bond is characterized by
| | | | |
A. the attraction of temporary dipoles produced by the random
| | | | | | | | | |
asymmetries in electron motion | | |
B. the electrostatic attraction between the permanent dipoles in any
| | | | | | | | | |
polar molecule |
C. the highly concentrated partial charge between an H atom and F, O,
| | | | | | | | | | | | |
or N atoms
| |
D. the covalent sharing of electrons between two atoms in a molecule
| | | | | | | | | | |
C. the highly concentrated partial charge between an H atom and F, O,
| | | | | | | | | | | | |
or N atoms
| |
(Ref: Week 1 Quiz)
| | |
,A. LDF's
| |
B. Dipole-Dipole
|
D. Covalent Bond
| |
Which of the following will have the strongest dipole-dipole attractions?
| | | | | | | | |
A. NCl3
|
B. CCl4
|
C. BCl3
|
D. Cl2
|
A. NCl3
| |
(Ref: Week 1 Quiz)
| | |
,Asymmetrical - Usually have a higher dipole moment
| | | | | | |
Why not BCl3? Because Nitrogen is more electronegative than Boron.
| | | | | | | | |
A cohesive force
| |
A. is the result of the intermolecular forces that attract identical
| | | | | | | | | | |
molecules
B. is the result of the intermolecular forces that attract different
| | | | | | | | | | |
molecules together |
C. is the result of covalent interactions between atoms in a molecule
| | | | | | | | | | |
D. is always stronger than an adhesive force
| | | | | | |
A. is the result of the intermolecular forces that attract identical
| | | | | | | | | | |
molecules
, (Ref: Week 1 Quiz)
| | |
Easy way to remember. Co = mutual so cohesive is identical molecules.
| | | | | | | | | | |
ΔHvap is |
A. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the gas phase
| | |
B. the energy change when a substance changes from the solid phase to
| | | | | | | | | | | |
the liquid phase
| | |
C. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the solid phase
| | |
D. the energy change when a substance changes from the solid phase
| | | | | | | | | | | |
directly to the gas phase
| | | |
A. the energy change when a substance changes from the liquid phase
| | | | | | | | | | | |
to the gas phase
| | |
