.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
UNE CHEM 102 General Chemistry II
Midterm Exam Prep 2026/2027 |
Comprehensive Review | Practice Problems
& Detailed Answer Explanations |
Chemistry Study Guide
An adhesive force
is the result of intermolecular forces that attract different molecules together
Metallic solids
are composed of atoms, with nuclei in a "sea" of delocalized electrons
Acetonitrile, CH3CN, is a common solvent used in organic chemistry labs. Acetonitrile
evaporates very quickly at room temperature and feels noticeably cold when evaporating. If ΔH
vap for acetonitrile is 34.2 kJ/mol, how much heat is removed when 2.3 g of acetonitrile
evaporates?
1.92 kJ
In a phase diagram, the critical temperature represents
the maximum temperature that a liquid can exist, regardless of pressure
A liquid is most likely to rise in a capillary tube when
the adhesive forces are stronger than the cohesive forces
1
, .//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
The correct expression to calculate the heat required to convert 100 g of liquid water starting at
12°C to steam at a final temperature of 135°C is
(m x c x ΔT)water + (n x ΔHvap) + (m x c x ΔT)steam
ΔHvap is
the energy change when a substance changes from liquid phase to gas phase
Which of the following will have the strongest dipole-dipole attraction? CCl4, NCl3, BCl3, Cl2
NCl3
A dispersion force is characterized by
the attraction of temporary dipoles produced by the random asymmetries in electron motion
Hexane is commonly used in labs as a solvent for nonpolar compounds. What is the molality of
22.3 mg of Vitamin D (C27H44O, 384.6 g/mol) in 50.0 mL of hexane. Hexane has a density of
0.661 g/mL.
1.75*10^-3 m
Which of the following will have the lowest conductivity when dissolved in water?
0.1 M potassium chloride, KCl
0.1 M sodium sulfate, Na2SO4
2
UNE CHEM 102 General Chemistry II
Midterm Exam Prep 2026/2027 |
Comprehensive Review | Practice Problems
& Detailed Answer Explanations |
Chemistry Study Guide
An adhesive force
is the result of intermolecular forces that attract different molecules together
Metallic solids
are composed of atoms, with nuclei in a "sea" of delocalized electrons
Acetonitrile, CH3CN, is a common solvent used in organic chemistry labs. Acetonitrile
evaporates very quickly at room temperature and feels noticeably cold when evaporating. If ΔH
vap for acetonitrile is 34.2 kJ/mol, how much heat is removed when 2.3 g of acetonitrile
evaporates?
1.92 kJ
In a phase diagram, the critical temperature represents
the maximum temperature that a liquid can exist, regardless of pressure
A liquid is most likely to rise in a capillary tube when
the adhesive forces are stronger than the cohesive forces
1
, .//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
The correct expression to calculate the heat required to convert 100 g of liquid water starting at
12°C to steam at a final temperature of 135°C is
(m x c x ΔT)water + (n x ΔHvap) + (m x c x ΔT)steam
ΔHvap is
the energy change when a substance changes from liquid phase to gas phase
Which of the following will have the strongest dipole-dipole attraction? CCl4, NCl3, BCl3, Cl2
NCl3
A dispersion force is characterized by
the attraction of temporary dipoles produced by the random asymmetries in electron motion
Hexane is commonly used in labs as a solvent for nonpolar compounds. What is the molality of
22.3 mg of Vitamin D (C27H44O, 384.6 g/mol) in 50.0 mL of hexane. Hexane has a density of
0.661 g/mL.
1.75*10^-3 m
Which of the following will have the lowest conductivity when dissolved in water?
0.1 M potassium chloride, KCl
0.1 M sodium sulfate, Na2SO4
2
