3/23/25, 7:19 Chem 210 Final: Mastering Chem Flashcards |
AM
CHEM 210 FINAL: MASTERING CHEM EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS
Terms in this set (177)
The hydrides of group 5A are NH3, PH3, AsH3, and SbH3.
Highest: Nh3 SbH3 AsH3 PH3
Arrange them from highest to lowest boiling point.
Dispersion What is the strongest type of intermolecular force present in H2?
Identify the compound that does not have dipole-dipole forces
Co2
as its strongest force.
Which of the following must be overcome during the boiling of
acetonitrile, CH3CN?
1 and 2 1. dispersion forces
2. dipole-dipole forces
3. hydrogen bonds
Place the following compounds in order of decreasing strength
of intermolecular forces.
I>III>II
I. CH3CH2CH2CH2CH2CH3 II. (CH3)3CCH3 III. (CH3)3CCH2CH3
Ion-dipole force What type of intermolecular force causes the dissolution of KF in water?
dispersion forces and dipole-dipole What Inter molecular forces are present in: HBr
forces
dispersion forces, dipole-dipole What Inter molecular forces are present in: CH3COOH
forces and hydrogen bonding
only dispersion forces What Inter molecular forces are present in: Br2
only dispersion forces What Inter molecular forces are present in: He
Based on the expected intermolecular forces, which noble gas
has the highest boiling point?
Ar
Xe
N
e
X
e
Kr
Choose the substance with the lowest
surface tension. C6H6
CH3CH2CH2CH
CH3CH2CH2CH3
3 CH3OH
H2O
(CH3)2C
O
Place the following substances in order of decreasing vapor
pressure at a given temperature.
CF4 > PF5 > BrF3
PF5 BrF3 CF4
Choose the substance with the lowest vapor pressure at a given
temperature.
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,3/23/25, 7:19 Chem 210 Final: Mastering Chem Flashcards |
AM
Cal2
Ar
CO
2
CaI
2
BF
3
PF5
Propanol 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?
24.9 kJ/mol
44.4 kj/mol
38.7 kJ/mol
12.3 kJ/mol
44.4 kJ/mol
52.7 kJ/mol
Calculate 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.
3.50 × 104 J
1.31 × 105 J
2.14 × 104 J
1.66 × 104 J
3.50 × 104 J
6.59 × 103 J
How 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.
67.7 kJ ΔHvap = 33.9
kJ/mol ΔHfus =
9.8 kJ/mol Cliq =
1.73 J/g°C Cgas
= 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting =
279.0 K Tboiling
= 353.0 K
A 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:
C and D only
1. specific heat capacity of the solid
2. heat of fusion
A 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
The solid will sublime into a gas 210 mmHg?
2/18
, 3/23/25, 7:19 Chem 210 Final: Mastering Chem Flashcards |
AM
Nothing (the solid will remain as a
solid). The solid will sublime into
a gas.
The solid will melt into a liquid.
The 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.
29.8 kJ/mol What is the enthalpy of vaporization of the substance?
29.8 kJ/mol
2.32×1023kJ/mol
0.431 kJ/mol
294 kJ/mol
Five different substances are given to you to be dissolved in
water. Which substances are most likely to undergo dissolution
lithium iodide, LiI in water?
sodium fluoride, lithium iodide, LiI
NaF potassium sodium fluoride,
bromide, KBr NaF potassium
bromide, KBr
benzene, C6H6
hexane, C6H14
The following substances dissolve when added to water.
Dipole-
Classify the substances according to the strongest solute-
dipole:
solvent interaction that will occur between the given
C2H5OH
substances and water during dissolution.
HF
C2H5O
Ion-dipole forces:
H HF
CuSO4
CuSO4
CaCl2
CaCl2
Which of the following compounds will be most soluble in ethanol
(CH3CH2OH)?
ethylene glycol (HOCH2CH2OH) hexane (CH3CH2CH2CH2CH2CH3)
ethylene glycol
(HOCH2CH2OH)
trimethylamine
(N(CH3)3) acetone
(CH3COCH3)
None of these compounds should be soluble in ethanol.
Cyclohexane (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?
CH3CH2CH2CH2CH3 CH2Cl
2 HI
NaBr
CH3CH2CH2CH2
CH3
Choose the situation below that would result in a ΔHsolution near 0.
When |ΔHsolute| < |
3/18
AM
CHEM 210 FINAL: MASTERING CHEM EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS
Terms in this set (177)
The hydrides of group 5A are NH3, PH3, AsH3, and SbH3.
Highest: Nh3 SbH3 AsH3 PH3
Arrange them from highest to lowest boiling point.
Dispersion What is the strongest type of intermolecular force present in H2?
Identify the compound that does not have dipole-dipole forces
Co2
as its strongest force.
Which of the following must be overcome during the boiling of
acetonitrile, CH3CN?
1 and 2 1. dispersion forces
2. dipole-dipole forces
3. hydrogen bonds
Place the following compounds in order of decreasing strength
of intermolecular forces.
I>III>II
I. CH3CH2CH2CH2CH2CH3 II. (CH3)3CCH3 III. (CH3)3CCH2CH3
Ion-dipole force What type of intermolecular force causes the dissolution of KF in water?
dispersion forces and dipole-dipole What Inter molecular forces are present in: HBr
forces
dispersion forces, dipole-dipole What Inter molecular forces are present in: CH3COOH
forces and hydrogen bonding
only dispersion forces What Inter molecular forces are present in: Br2
only dispersion forces What Inter molecular forces are present in: He
Based on the expected intermolecular forces, which noble gas
has the highest boiling point?
Ar
Xe
N
e
X
e
Kr
Choose the substance with the lowest
surface tension. C6H6
CH3CH2CH2CH
CH3CH2CH2CH3
3 CH3OH
H2O
(CH3)2C
O
Place the following substances in order of decreasing vapor
pressure at a given temperature.
CF4 > PF5 > BrF3
PF5 BrF3 CF4
Choose the substance with the lowest vapor pressure at a given
temperature.
1/18
,3/23/25, 7:19 Chem 210 Final: Mastering Chem Flashcards |
AM
Cal2
Ar
CO
2
CaI
2
BF
3
PF5
Propanol 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?
24.9 kJ/mol
44.4 kj/mol
38.7 kJ/mol
12.3 kJ/mol
44.4 kJ/mol
52.7 kJ/mol
Calculate 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.
3.50 × 104 J
1.31 × 105 J
2.14 × 104 J
1.66 × 104 J
3.50 × 104 J
6.59 × 103 J
How 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.
67.7 kJ ΔHvap = 33.9
kJ/mol ΔHfus =
9.8 kJ/mol Cliq =
1.73 J/g°C Cgas
= 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting =
279.0 K Tboiling
= 353.0 K
A 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:
C and D only
1. specific heat capacity of the solid
2. heat of fusion
A 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
The solid will sublime into a gas 210 mmHg?
2/18
, 3/23/25, 7:19 Chem 210 Final: Mastering Chem Flashcards |
AM
Nothing (the solid will remain as a
solid). The solid will sublime into
a gas.
The solid will melt into a liquid.
The 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.
29.8 kJ/mol What is the enthalpy of vaporization of the substance?
29.8 kJ/mol
2.32×1023kJ/mol
0.431 kJ/mol
294 kJ/mol
Five different substances are given to you to be dissolved in
water. Which substances are most likely to undergo dissolution
lithium iodide, LiI in water?
sodium fluoride, lithium iodide, LiI
NaF potassium sodium fluoride,
bromide, KBr NaF potassium
bromide, KBr
benzene, C6H6
hexane, C6H14
The following substances dissolve when added to water.
Dipole-
Classify the substances according to the strongest solute-
dipole:
solvent interaction that will occur between the given
C2H5OH
substances and water during dissolution.
HF
C2H5O
Ion-dipole forces:
H HF
CuSO4
CuSO4
CaCl2
CaCl2
Which of the following compounds will be most soluble in ethanol
(CH3CH2OH)?
ethylene glycol (HOCH2CH2OH) hexane (CH3CH2CH2CH2CH2CH3)
ethylene glycol
(HOCH2CH2OH)
trimethylamine
(N(CH3)3) acetone
(CH3COCH3)
None of these compounds should be soluble in ethanol.
Cyclohexane (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?
CH3CH2CH2CH2CH3 CH2Cl
2 HI
NaBr
CH3CH2CH2CH2
CH3
Choose the situation below that would result in a ΔHsolution near 0.
When |ΔHsolute| < |
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