CHEM 2 ACS FINAL EXAM 2025 PRACTICE
QUESTIONS AND ANSWERS GRADED A+
The distance between molecules in gases are _____
far apart in gases
1 mol of any gas at STP is
22.4 liters
the lighter the gas, _____
the faster the effusion rate
the deviation from ideal behavior of a gas is most evident at high _____ and low
_____
pressure, temp
Non reacting gas mixtures are homongeneous
normal melting point at
,760 torr or 1 atm
the kinetic-molecular theory predicts that pressure rises as the temperature of a gas
increases because_______
both the gas molecules collide more frequently with the wall and the gas molecules
collide more energetically with the wall
hydrogen bonding
H with N,O,F
isothermal means
at constant temperature
STP
273.15 K and 1 atm
the van der Waals equation
gas particles have non-zero volumes and interact with each other, molar volumes
of gases of different types are different, the non-zero volumes of gas particles
effectively decrease the amount of "empty" space between them, the molecular
attractions between particles of gas decreases the pressure exerted by the gas
,viscosity is __
the resistance to flow
viscosity increases as
temperature decreases, molecular weight increases, intermolecular forces increase
a volatile liquid is one that
readily evaporates
the vapor pressure of any substance at its normal boiling point is
1 atm
as intermolecular forces increase, vapor pressure ___
decreases
as intermolecular forces increase, normal boiling point ___
increases
, as intermolecular forces increase, heat of vaporization ___
increases
as intermolecular forces increase, surface tension ___
increases
how are boiling points affected by intermolecular forces?
stronger intermolecular forces between molecules make it more difficult for those
molecules to be pulled apart. Therefore, stronger intermolecular forces result in
higher boiling points
solid to liquid
liquid to solid
melting
freezing
liquid to gas
gas to liquid
evaporation
condensation
QUESTIONS AND ANSWERS GRADED A+
The distance between molecules in gases are _____
far apart in gases
1 mol of any gas at STP is
22.4 liters
the lighter the gas, _____
the faster the effusion rate
the deviation from ideal behavior of a gas is most evident at high _____ and low
_____
pressure, temp
Non reacting gas mixtures are homongeneous
normal melting point at
,760 torr or 1 atm
the kinetic-molecular theory predicts that pressure rises as the temperature of a gas
increases because_______
both the gas molecules collide more frequently with the wall and the gas molecules
collide more energetically with the wall
hydrogen bonding
H with N,O,F
isothermal means
at constant temperature
STP
273.15 K and 1 atm
the van der Waals equation
gas particles have non-zero volumes and interact with each other, molar volumes
of gases of different types are different, the non-zero volumes of gas particles
effectively decrease the amount of "empty" space between them, the molecular
attractions between particles of gas decreases the pressure exerted by the gas
,viscosity is __
the resistance to flow
viscosity increases as
temperature decreases, molecular weight increases, intermolecular forces increase
a volatile liquid is one that
readily evaporates
the vapor pressure of any substance at its normal boiling point is
1 atm
as intermolecular forces increase, vapor pressure ___
decreases
as intermolecular forces increase, normal boiling point ___
increases
, as intermolecular forces increase, heat of vaporization ___
increases
as intermolecular forces increase, surface tension ___
increases
how are boiling points affected by intermolecular forces?
stronger intermolecular forces between molecules make it more difficult for those
molecules to be pulled apart. Therefore, stronger intermolecular forces result in
higher boiling points
solid to liquid
liquid to solid
melting
freezing
liquid to gas
gas to liquid
evaporation
condensation
