CHEM 1035 Final Exam Study Guide 2023 with complete
solution- Virginia Tech
Weakest forces, exist in all substances, only force in non-polar substances, form
temporary dipoles
London or Dispersion forces
Dispersion forces ____ with increasing molar mass
increase
Stronger than dispersion forces, only present in polar substances, attraction between
oppositely charges ends of polar molecules
Dipole-dipole forces
Dipole-dipole forces ____ with increasing molar mass
increase
Very strong dipole force, only exist in compounds where H is covalently bonded to O, N,
or F, due to high electronegativity difference in H and O, N, or F
Hydrogen bonds
Hydrogen bonded substances have ____ boiling points
high
The strength of hydrogen bonds _____ when ____ H-bonding sites are present
increase, more
Intermolecular forces between 2 different substances, between an ion and a polar
molecule, attraction between oppositely charged ends of polar molecule and
positive/negatively charged ion
Ion-dipole forces
dispersion, dipole-dipole, hydrogen bonding, ion-dipole
Intermolecular forces in order on increasing strength
The ____ the intermolecular forces the higher the boiling point
stronger
For substances with the same type of intermolecular forces the boiling point __ with
increasing molar mass
increases
Viscosity is dependent on
intermolecular forces and temperature
Viscosity _____ with increasing temperature
decreases
Viscosity _____ with stronger intermolecular forces
increases
Surface tension is dependent on [2 things]
intermolecular forces and temperature
Surface tension ____ with stronger intermolecular forces
increases
Surface tension _____ with increasing temperature
decreases
Vapor pressure is dependent on
intermolecular forces and temperature
, Vapor pressure ____ with stronger intermolecular forces
decreases
Vapor Pressure ___ with increasing temperature
increases
Boiling point is the point where
vapor pressure overcomes atmospheric pressure
Boiling Point is dependent on
intermolecular forces and atmospheric pressure
Boiling point is ____ when intermolecular forces are weak
low
Boiling point ____ with increasing atmospheric pressure
increases
solid to gas
sublimation
solid to liquid
melting
liquid to gas
vaporization
gas to liquid
condensation
liquid to solid
freezing
gas to solid
deposition
sublimation(subl), vaporization(vap), and melting(fus)
delta H positive
condensation(vap), freezing(fus), and deposition(subl)
delta H is negative
1 atm = ___ mm Hg = ___ Torr
760
(molar massP) / (RT)
density
mole ratio * total pressure
partial pressure
sum of partial pressures
total pressure
the movement of one gas through another
diffusion
the movement of gas particles through a pinhole
effusion
Real gases: The volume of gas particles are not equal to ___.There ___ attractive
forces
zero; are slight
1 oC and 1 atm
STP
= nRT
solution- Virginia Tech
Weakest forces, exist in all substances, only force in non-polar substances, form
temporary dipoles
London or Dispersion forces
Dispersion forces ____ with increasing molar mass
increase
Stronger than dispersion forces, only present in polar substances, attraction between
oppositely charges ends of polar molecules
Dipole-dipole forces
Dipole-dipole forces ____ with increasing molar mass
increase
Very strong dipole force, only exist in compounds where H is covalently bonded to O, N,
or F, due to high electronegativity difference in H and O, N, or F
Hydrogen bonds
Hydrogen bonded substances have ____ boiling points
high
The strength of hydrogen bonds _____ when ____ H-bonding sites are present
increase, more
Intermolecular forces between 2 different substances, between an ion and a polar
molecule, attraction between oppositely charged ends of polar molecule and
positive/negatively charged ion
Ion-dipole forces
dispersion, dipole-dipole, hydrogen bonding, ion-dipole
Intermolecular forces in order on increasing strength
The ____ the intermolecular forces the higher the boiling point
stronger
For substances with the same type of intermolecular forces the boiling point __ with
increasing molar mass
increases
Viscosity is dependent on
intermolecular forces and temperature
Viscosity _____ with increasing temperature
decreases
Viscosity _____ with stronger intermolecular forces
increases
Surface tension is dependent on [2 things]
intermolecular forces and temperature
Surface tension ____ with stronger intermolecular forces
increases
Surface tension _____ with increasing temperature
decreases
Vapor pressure is dependent on
intermolecular forces and temperature
, Vapor pressure ____ with stronger intermolecular forces
decreases
Vapor Pressure ___ with increasing temperature
increases
Boiling point is the point where
vapor pressure overcomes atmospheric pressure
Boiling Point is dependent on
intermolecular forces and atmospheric pressure
Boiling point is ____ when intermolecular forces are weak
low
Boiling point ____ with increasing atmospheric pressure
increases
solid to gas
sublimation
solid to liquid
melting
liquid to gas
vaporization
gas to liquid
condensation
liquid to solid
freezing
gas to solid
deposition
sublimation(subl), vaporization(vap), and melting(fus)
delta H positive
condensation(vap), freezing(fus), and deposition(subl)
delta H is negative
1 atm = ___ mm Hg = ___ Torr
760
(molar massP) / (RT)
density
mole ratio * total pressure
partial pressure
sum of partial pressures
total pressure
the movement of one gas through another
diffusion
the movement of gas particles through a pinhole
effusion
Real gases: The volume of gas particles are not equal to ___.There ___ attractive
forces
zero; are slight
1 oC and 1 atm
STP
= nRT
