UNE CHEM 1011 General Chemistry II
Midterm Fall 2020 Exam Questions And
Actual Answers.
intermolecular forces - Answer the various forces of attraction that may exist between the
atoms and molecules of a substance due to electrostatic phenomena
kinetic energies - Answer the energy required to overcome the attractive forces and thus
increase the distance between particles
Intramolecular forces - Answer within the molecule that keep the molecule together
Intermolecular forces - Answer attractions between molecules, which determine many of the
physical properties of a substance.
van der Waals forces - Answer all of the attractive forces between neutral atoms and
molecules
the London dispersion force - Answer one of three van der Waals forces is present in all
condensed phases, known as "dispersion force". electrons of an atom or molecule are in
constant motion.
instantaneous dipole - Answer if its electrons are distributed asymmetrically
induced dipole - Answer distort the electrons of a neighboring atom or molecule
Dispersion forces trend - Answer Larger and heavier atoms and molecules exhibit stronger
dispersion forces than do smaller and lighter atoms and molecules.
Halogen molar mass, atomic radius, melting point, and boiling point trend - Answer from the
top of the group of halogens to the bottom all of the molar mass, atomic radius, melting point,
and boiling point will be increasing.
Reason behind molar mass, atomic radius, melting point, and boiling point trend - Answer
, Polarizability - Answer The measure of how easy or difficult it is for another electrostatic
charge (for example, a nearby ion or polar molecule) to distort a molecule's charge distribution
(its electron cloud) is...
Hydrogen bonding - Answer Molecules with F-H, O-H, or N-H
viscosity - Answer measure of its resistance to flow
factors of viscosity - Answer IMFs between the molecules of a liquid, the size and shape of the
molecules, and the temperature
viscosity of the liquid decreases. - Answer As the temperature increases, the molecules move
more rapidly and their kinetic energies are better able to overcome the forces that hold them
together; thus...
cohesive forces - Answer IMF between identical molecules of a substance are...
Surface tension - Answer as the energy required to increase the surface area of a liquid, or the
force required to increase the length of a liquid surface by a given amount.
adhesive forces - Answer IMFs of attraction between two different molecules
capillary action - Answer when a liquid flows within a porous material due to the attraction of
the liquid molecules to the surface of the material and to other liquid molecules.
boiling point - Answer temperature at which its equilibrium vapor pressure is equal to the
pressure exerted on the liquid by its gaseous surroundings.
normal boiling point - Answer its boiling point when surrounding pressure is equal to 1 atm
Vaporization is an... - Answer endothermic process
endothermic - Answer positive number
Midterm Fall 2020 Exam Questions And
Actual Answers.
intermolecular forces - Answer the various forces of attraction that may exist between the
atoms and molecules of a substance due to electrostatic phenomena
kinetic energies - Answer the energy required to overcome the attractive forces and thus
increase the distance between particles
Intramolecular forces - Answer within the molecule that keep the molecule together
Intermolecular forces - Answer attractions between molecules, which determine many of the
physical properties of a substance.
van der Waals forces - Answer all of the attractive forces between neutral atoms and
molecules
the London dispersion force - Answer one of three van der Waals forces is present in all
condensed phases, known as "dispersion force". electrons of an atom or molecule are in
constant motion.
instantaneous dipole - Answer if its electrons are distributed asymmetrically
induced dipole - Answer distort the electrons of a neighboring atom or molecule
Dispersion forces trend - Answer Larger and heavier atoms and molecules exhibit stronger
dispersion forces than do smaller and lighter atoms and molecules.
Halogen molar mass, atomic radius, melting point, and boiling point trend - Answer from the
top of the group of halogens to the bottom all of the molar mass, atomic radius, melting point,
and boiling point will be increasing.
Reason behind molar mass, atomic radius, melting point, and boiling point trend - Answer
, Polarizability - Answer The measure of how easy or difficult it is for another electrostatic
charge (for example, a nearby ion or polar molecule) to distort a molecule's charge distribution
(its electron cloud) is...
Hydrogen bonding - Answer Molecules with F-H, O-H, or N-H
viscosity - Answer measure of its resistance to flow
factors of viscosity - Answer IMFs between the molecules of a liquid, the size and shape of the
molecules, and the temperature
viscosity of the liquid decreases. - Answer As the temperature increases, the molecules move
more rapidly and their kinetic energies are better able to overcome the forces that hold them
together; thus...
cohesive forces - Answer IMF between identical molecules of a substance are...
Surface tension - Answer as the energy required to increase the surface area of a liquid, or the
force required to increase the length of a liquid surface by a given amount.
adhesive forces - Answer IMFs of attraction between two different molecules
capillary action - Answer when a liquid flows within a porous material due to the attraction of
the liquid molecules to the surface of the material and to other liquid molecules.
boiling point - Answer temperature at which its equilibrium vapor pressure is equal to the
pressure exerted on the liquid by its gaseous surroundings.
normal boiling point - Answer its boiling point when surrounding pressure is equal to 1 atm
Vaporization is an... - Answer endothermic process
endothermic - Answer positive number
