CHEM 210 FINAL: MASTERING CHEM EXAM WITH CORRECT QUESTIONS AND ANSWERS 2025
L Highest: Nh3 SbH3 AsH3 PH3 - CORRECT-ANSWERSThe hydrides of
group 5A are NH3, PH3, AsH3, and SbH3. Arrange them from highest
to lowest boiling point.
L Dispersion - CORRECT-ANSWERSWhat is the strongest type of
intermolecular force present in H2?
L Co2 - CORRECT-ANSWERSIdentify the compound that does not have
dipole-dipole forces as its strongest force.
L 1 and 2 - CORRECT-ANSWERSWhich of the following must be
overcome during the boiling of acetonitrile, CH3CN?
L dispersion forces
L dipole-dipole forces
L hydrogen bonds
L I>III>II - CORRECT-ANSWERSPlace the following compounds in
order of decreasing strength of intermolecular forces.
o CH3CH2CH2CH2CH2CH3 II. (CH3)3CCH3 III.
(CH3)3CCH2CH3
L Ion-dipole force - CORRECT-ANSWERSWhat type of intermolecular
force causes the dissolution of KF in water?
L dispersion forces and dipole-dipole forces - CORRECT-ANSWERSWhat
Inter molecular forces are present in: HBr
L dispersion forces, dipole-dipole forces and hydrogen bonding -
CORRECT-ANSWERSWhat Inter molecular forces are present in:
CH3COOH
L only dispersion forces - CORRECT-ANSWERSWhat Inter molecular
forces are present in: Br2
L only dispersion forces - CORRECT-ANSWERSWhat Inter molecular
forces are present in: He
L Xe - CORRECT-ANSWERSBased on the expected intermolecular
forces, which noble gas has the highest boiling point?
L Ar
L Ne
L Xe
L Kr
L CH3CH2CH2CH3 - CORRECT-ANSWERSChoose the substance with
the lowest surface tension.
L C6H6
L CH3CH2CH2CH3
L CH3OH
L H2O
L (CH3)2CO
,L CF4 > PF5 > BrF3 - CORRECT-ANSWERSPlace the following
substances in order of decreasing vapor pressure at a given
temperature.
L PF5 BrF3 CF4
L Cal2 - CORRECT-ANSWERSChoose the substance with the lowest
vapor pressure at a given temperature.
L Ar
L CO2
L CaI2
L BF3
L PF5
L 44.4 kj/mol - CORRECT-ANSWERSPropanol has a normal boiling point
of 97.8°C. At 400 torr, it has a boiling point of 82.0°C. What is the
heat of vaporization?
L 24.9 kJ/mol
L 38.7 kJ/mol
L 12.3 kJ/mol
L 44.4 kJ/mol
L 52.7 kJ/mol
L 3.50 × 104 J - CORRECT-ANSWERSCalculate the energy that is
required to change 50.0 g ice at -30.0°C to a liquid at 73.0°C. The
heat of fusion = 333 J/g, the heat of vaporization = 2256 J/g, and the
specific heat capacities of ice = 2.06 J/gK and liquid water = 4.184
J/gK.
L 1.31 × 105 J
L 2.14 × 104 J
L 1.66 × 104 J
L 3.50 × 104 J
L 6.59 × 103 J
L 67.7 kJ - CORRECT-ANSWERSHow much energy must be removed
from a 125 g sample of benzene (molar mass= 78.11 g/mol) at 425.0 K
to liquify the sample and lower the temperature to 335.0 K? The
following physical data may be useful.
L ΔHvap = 33.9 kJ/mol
L ΔHfus = 9.8 kJ/mol
L Cliq = 1.73 J/g°C
L Cgas = 1.06 J/g°C
L Csol = 1.51 J/g°C
L Tmelting = 279.0 K
L Tboiling = 353.0 K
,L C and D only - CORRECT-ANSWERSA hypothetical substance has a
melting point of −10°C and a boiling point of 155°C. If this substance
is heated from 2°C to the gas at 155°C, which of the following would
be used in the calculation:
L specific heat capacity of the solid
L heat of fusion
L specific heat capacity of the liquid
L heat of vaporization
L specific heat capacity of the gas
L The solid will sublime into a gas - CORRECT-ANSWERSA substance
has a triple point at −24.5 ∘C and 225 mmHg. What is most likely to
happen to a solid sample of the substance as it is warmed from −35
∘C to 5 ∘C at a pressure of 210 mmHg?
L Nothing (the solid will remain as a solid).
L The solid will sublime into a gas.
L The solid will melt into a liquid.
L 29.8 kJ/mol - CORRECT-ANSWERSThe vapor pressure of a substance
is measured over a range of temperatures. A plot of the natural log of
the vapor pressure versus the inverse of the temperature (in Kelvin)
produces a straight line with a slope of −3.58×103K.
L What is the enthalpy of vaporization of the substance?
L 29.8 kJ/mol
L 2.32×1023kJ/mol
L 0.431 kJ/mol
L 294 kJ/mol
L lithium iodide, LiI
L sodium fluoride, NaF
L potassium bromide, KBr - CORRECT-ANSWERSFive different
substances are given to you to be dissolved in water. Which
substances are most likely to undergo dissolution in water?
L lithium iodide, LiI
L sodium fluoride, NaF
L potassium bromide, KBr
L benzene, C6H6
L hexane, C6H14
L Dipole-dipole:
L C2H5OH
L HF
L Ion-dipole forces:
L CuSO4
L CaCl2 - CORRECT-ANSWERSThe following substances dissolve when
added to water. Classify the substances according to the strongest
solute-solvent interaction that will occur between the given
substances and water during dissolution.
, L C2H5OH
L HF
L CuSO4
L CaCl2
L ethylene glycol (HOCH2CH2OH) - CORRECT-ANSWERSWhich of the
following compounds will be most soluble in ethanol (CH3CH2OH)?
L hexane (CH3CH2CH2CH2CH2CH3)
L ethylene glycol (HOCH2CH2OH)
L trimethylamine (N(CH3)3)
L acetone (CH3COCH3)
L None of these compounds should be soluble in ethanol.
L CH3CH2CH2CH2CH3 - CORRECT-ANSWERSCyclohexane (C6H12) is
a hydrocarbon (a substance containing only carbon and hydrogen)
liquid. Which of the following will most likely dissolve in cyclohexane
to form a solution?
L CH2Cl2
L HI
L NaBr
L CH3CH2CH2CH2CH3
L When |ΔHsolute| is close to |ΔHhydration| - CORRECT-
ANSWERSChoose the situation below that would result in a
ΔHsolution near 0.
L When |ΔHsolute| < |ΔHhydration|
L When |ΔHsolvent| >> |ΔHsolute|
L When |ΔHsolute| is close to |ΔHhydration|
L When |ΔHsolute| > |ΔHhydration|
L There isn't enough information to determine.
L |ΔHsolute|>|ΔHhydration - CORRECT-ANSWERSWhat can you
conclude about the relative magnitudes of the absolute values of
ΔHsolute and ΔHhydration, where ΔHsolute is the heat associated
with separating the solute particles and ΔHhydration is the heat
associated with dissolving the solute particles in water?
L |ΔHsolute|>|ΔHhydration|
L |ΔHsolute|<|ΔHhydration|
L |ΔHsolute|=|ΔHhydration|
L none of the above (nothing can be concluded about the relative
magnitudes)
L CO - CORRECT-ANSWERSWhich of the following should have the
largest Henry's law constant (kH) in water?
L Xe
L Cl2
L CO
L Highest: Nh3 SbH3 AsH3 PH3 - CORRECT-ANSWERSThe hydrides of
group 5A are NH3, PH3, AsH3, and SbH3. Arrange them from highest
to lowest boiling point.
L Dispersion - CORRECT-ANSWERSWhat is the strongest type of
intermolecular force present in H2?
L Co2 - CORRECT-ANSWERSIdentify the compound that does not have
dipole-dipole forces as its strongest force.
L 1 and 2 - CORRECT-ANSWERSWhich of the following must be
overcome during the boiling of acetonitrile, CH3CN?
L dispersion forces
L dipole-dipole forces
L hydrogen bonds
L I>III>II - CORRECT-ANSWERSPlace the following compounds in
order of decreasing strength of intermolecular forces.
o CH3CH2CH2CH2CH2CH3 II. (CH3)3CCH3 III.
(CH3)3CCH2CH3
L Ion-dipole force - CORRECT-ANSWERSWhat type of intermolecular
force causes the dissolution of KF in water?
L dispersion forces and dipole-dipole forces - CORRECT-ANSWERSWhat
Inter molecular forces are present in: HBr
L dispersion forces, dipole-dipole forces and hydrogen bonding -
CORRECT-ANSWERSWhat Inter molecular forces are present in:
CH3COOH
L only dispersion forces - CORRECT-ANSWERSWhat Inter molecular
forces are present in: Br2
L only dispersion forces - CORRECT-ANSWERSWhat Inter molecular
forces are present in: He
L Xe - CORRECT-ANSWERSBased on the expected intermolecular
forces, which noble gas has the highest boiling point?
L Ar
L Ne
L Xe
L Kr
L CH3CH2CH2CH3 - CORRECT-ANSWERSChoose the substance with
the lowest surface tension.
L C6H6
L CH3CH2CH2CH3
L CH3OH
L H2O
L (CH3)2CO
,L CF4 > PF5 > BrF3 - CORRECT-ANSWERSPlace the following
substances in order of decreasing vapor pressure at a given
temperature.
L PF5 BrF3 CF4
L Cal2 - CORRECT-ANSWERSChoose the substance with the lowest
vapor pressure at a given temperature.
L Ar
L CO2
L CaI2
L BF3
L PF5
L 44.4 kj/mol - CORRECT-ANSWERSPropanol has a normal boiling point
of 97.8°C. At 400 torr, it has a boiling point of 82.0°C. What is the
heat of vaporization?
L 24.9 kJ/mol
L 38.7 kJ/mol
L 12.3 kJ/mol
L 44.4 kJ/mol
L 52.7 kJ/mol
L 3.50 × 104 J - CORRECT-ANSWERSCalculate the energy that is
required to change 50.0 g ice at -30.0°C to a liquid at 73.0°C. The
heat of fusion = 333 J/g, the heat of vaporization = 2256 J/g, and the
specific heat capacities of ice = 2.06 J/gK and liquid water = 4.184
J/gK.
L 1.31 × 105 J
L 2.14 × 104 J
L 1.66 × 104 J
L 3.50 × 104 J
L 6.59 × 103 J
L 67.7 kJ - CORRECT-ANSWERSHow much energy must be removed
from a 125 g sample of benzene (molar mass= 78.11 g/mol) at 425.0 K
to liquify the sample and lower the temperature to 335.0 K? The
following physical data may be useful.
L ΔHvap = 33.9 kJ/mol
L ΔHfus = 9.8 kJ/mol
L Cliq = 1.73 J/g°C
L Cgas = 1.06 J/g°C
L Csol = 1.51 J/g°C
L Tmelting = 279.0 K
L Tboiling = 353.0 K
,L C and D only - CORRECT-ANSWERSA hypothetical substance has a
melting point of −10°C and a boiling point of 155°C. If this substance
is heated from 2°C to the gas at 155°C, which of the following would
be used in the calculation:
L specific heat capacity of the solid
L heat of fusion
L specific heat capacity of the liquid
L heat of vaporization
L specific heat capacity of the gas
L The solid will sublime into a gas - CORRECT-ANSWERSA substance
has a triple point at −24.5 ∘C and 225 mmHg. What is most likely to
happen to a solid sample of the substance as it is warmed from −35
∘C to 5 ∘C at a pressure of 210 mmHg?
L Nothing (the solid will remain as a solid).
L The solid will sublime into a gas.
L The solid will melt into a liquid.
L 29.8 kJ/mol - CORRECT-ANSWERSThe vapor pressure of a substance
is measured over a range of temperatures. A plot of the natural log of
the vapor pressure versus the inverse of the temperature (in Kelvin)
produces a straight line with a slope of −3.58×103K.
L What is the enthalpy of vaporization of the substance?
L 29.8 kJ/mol
L 2.32×1023kJ/mol
L 0.431 kJ/mol
L 294 kJ/mol
L lithium iodide, LiI
L sodium fluoride, NaF
L potassium bromide, KBr - CORRECT-ANSWERSFive different
substances are given to you to be dissolved in water. Which
substances are most likely to undergo dissolution in water?
L lithium iodide, LiI
L sodium fluoride, NaF
L potassium bromide, KBr
L benzene, C6H6
L hexane, C6H14
L Dipole-dipole:
L C2H5OH
L HF
L Ion-dipole forces:
L CuSO4
L CaCl2 - CORRECT-ANSWERSThe following substances dissolve when
added to water. Classify the substances according to the strongest
solute-solvent interaction that will occur between the given
substances and water during dissolution.
, L C2H5OH
L HF
L CuSO4
L CaCl2
L ethylene glycol (HOCH2CH2OH) - CORRECT-ANSWERSWhich of the
following compounds will be most soluble in ethanol (CH3CH2OH)?
L hexane (CH3CH2CH2CH2CH2CH3)
L ethylene glycol (HOCH2CH2OH)
L trimethylamine (N(CH3)3)
L acetone (CH3COCH3)
L None of these compounds should be soluble in ethanol.
L CH3CH2CH2CH2CH3 - CORRECT-ANSWERSCyclohexane (C6H12) is
a hydrocarbon (a substance containing only carbon and hydrogen)
liquid. Which of the following will most likely dissolve in cyclohexane
to form a solution?
L CH2Cl2
L HI
L NaBr
L CH3CH2CH2CH2CH3
L When |ΔHsolute| is close to |ΔHhydration| - CORRECT-
ANSWERSChoose the situation below that would result in a
ΔHsolution near 0.
L When |ΔHsolute| < |ΔHhydration|
L When |ΔHsolvent| >> |ΔHsolute|
L When |ΔHsolute| is close to |ΔHhydration|
L When |ΔHsolute| > |ΔHhydration|
L There isn't enough information to determine.
L |ΔHsolute|>|ΔHhydration - CORRECT-ANSWERSWhat can you
conclude about the relative magnitudes of the absolute values of
ΔHsolute and ΔHhydration, where ΔHsolute is the heat associated
with separating the solute particles and ΔHhydration is the heat
associated with dissolving the solute particles in water?
L |ΔHsolute|>|ΔHhydration|
L |ΔHsolute|<|ΔHhydration|
L |ΔHsolute|=|ΔHhydration|
L none of the above (nothing can be concluded about the relative
magnitudes)
L CO - CORRECT-ANSWERSWhich of the following should have the
largest Henry's law constant (kH) in water?
L Xe
L Cl2
L CO
