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UNE CHEM 1011 Midterm
Study Guide | General
Chemistry Exam Prep &
Practice Questions & Study
Guide
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A hydrogen bond is characterized by C. the highly concentrated partial charge between an H atom and F, O, or N
atoms
A. the attraction of temporary dipoles produced by the
random asymmetries in electron motion (Ref: Week 1 Quiz)
B. the electrostatic attraction between the permanent A. LDF's
dipoles in any polar molecule
B. Dipole-Dipole
C. the highly concentrated partial charge between an
H atom and F, O, or N atoms D. Covalent Bond
D. the covalent sharing of electrons between two
atoms in a molecule
Which of the following will have the strongest dipole- A. NCl3
dipole attractions?
(Ref: Week 1 Quiz)
A. NCl3
Asymmetrical - Usually have a higher dipole moment
B. CCl4 Why not BCl3? Because Nitrogen is more electronegative than Boron.
C. BCl3
D. Cl2
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A cohesive force A. is the result of the intermolecular forces that attract identical molecules
A. is the result of the intermolecular forces that attract (Ref: Week 1 Quiz)
identical molecules
Easy way to remember. Co = mutual so cohesive is 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
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ΔHvap is A. the energy change when a substance changes from the liquid phase to the
gas phase
A. the energy change when a substance changes from
the liquid phase to the gas phase (Ref: Week 1 Quiz)
B. the energy change when a substance changes from Liquid → Gas (Vaporization)
the solid phase to the liquid phase Ex: Boiling
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 liquid in a tube will form a convex meniscus when B. the cohesive forces are stronger than the adhesive forces.
A. the adhesive forces are stronger than the cohesive (Ref: Week 1 Quiz)
forces
B. the cohesive forces are stronger than the adhesive
forces
C. the adhesive forces are equal to the cohesive forces
D. it's impossible to predict
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