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Intermolecular forces: Strength
Related Topics
Wize University Chemistry Textbook > Intermolecular Forces and Physical Properties
Intermolecular Forces
5 Activities
Which of the following exhibit the strongest intermolecular forces?
Hg
H
2
O
HF
CH
3
CH
2
CH
2
CH
2
CH
2
CH
2
CH
3
I don't know
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More Intermolecular Forces Questions:
Intermolecular forces: Ranking Boiling Points
Please rank the following compounds from lowest boiling point to highest boiling point.
HOCH
2
CH
2
OH, CH
4
, CH
3
Cl, CH
3
CH
2
CH
3
, CH
3
OH
Intermolecular Forces
In each pair of molecules, determine which would have the higher boiling point.
a)
C
8
H
18
(non-polar) and CH
4
b)
C
8
H
18
(non-polar) and HF
Stereoisomerism
Which two molecules have the same boiling point?
Inetrmolecular Forces, Bond Polarity
1. Compare the boiling points of group 15 hydrides.
2. Compare the boiling points of all four haloacids.
Choose the correct option:
Intermolecular forces
Describe the strongest intermolecular forces in the following compounds.
Intermolecular Forces: Melting Points
Provide an explanation for the difference in melting points of the following two compounds:
Intermolecular Forces: Melting point
For each pair of molecules, determine which will have the higher melting point.(1st/2nd)
a)
b)
Intermolecular Forces
Which substance exhibits hydrogen bonding?
Intermolecular Forces
For which of the following compounds is hydrogen bonding an important intermolecular force?
Intermolecular Forces
Which ONE of the following pairs of molecule and intermolecular force is CORRECT?
What type of intermolecular forces are present in SO
2(g)
?
A. Dipole-Dipole
B. Ion-Induced Dipole
Which of the following molecules has the strongest intermolecular forces?
Which of the following is expected to have the strongest surface tension?
Intermolecular forces: Boiling point
Rank the following in order of increasing boiling point
H
3
CCH
3
, KBr, CH
3
NH
2
, CH
3
I
The surface tension of hexane is lower than the surface tension of hexanol because:
Intermolecular forces
Choose the correct statement from the following:
H-bonding
Which one has lower melting point?
Intermolecular Forces
Which one of these two compounds has lower boiling point?
Inetrmolecular Forces
1. Compare the boiling points of group 15 hydrides.
2. Compare the boiling points of all four haloacids.
boiling point
Which of the following compounds has the highest boiling point at atmospheric pressure?
Water, Methanol, Hexane, Sulfuric acid
The boiling points of hydrocarbons increase as the hydrocarbon gets more carbon atoms added to it. Methane CH
4
(-161.5
o
C), ethane C
2
H
6
(-89
o
C), propane C
3
H
8
(-42
o
C) This can best be explained by:
Intermolecular forces
Choose the correct intermolecular forces in the following compounds.
Intermolecular Forces & Liquid Properties
Rank the following compounds from the lowest to highest boiling point: CH
4
, NH
4
, H
2
S. For each molecule also indicate what inter molecular forces exist. Explain the reasoning for this order.
Intermolecular forces: Strength
A solid sample of PbBr
2
is added to water, and the solid does not dissolve, creating a heterogeneous mixture. What is the strongest IMF that exists in this mixture of compounds?
Intermolecular Forces
In each pair of molecules, determine which would have the higher boiling point.
a)
C
8
H
18
(non-polar) and CH
4
b)
C
8
H
18
(non-polar) and HF
Intermolecular Forces
Determine what is the strongest type of intermolecular force that could exist between the two molecules in the following mixtures.
I = ionic
D = dipole
Intermolecular Forces
In each pair of molecules, determine which would have the
lower boiling point
.
a)
AgBr and H
2
O
b)
AgBr and CO
2
Intermolecular Forces
A AgBr salt is completely insoluble in water (H
2
O). What is the strongest type of interaction that would exist in a mixture of AgBr and H
2
O?
Intermolecular Forces
Determine what is the strongest type of intermolecular force that could exist between the two molecules in the following mixtures.
I = ionic
D = dipole
Intermolecular forces
Place the following in order of increasing melting point:
CO
2
, Ne, CH
3
OH, KI
How would the order change if I asked you to order those molecules in order of increasing boiling point?
Which of the following would have the highest boiling point?
Based on the three examples below, rank the strength of the intermolecular interaction from highest to lowest.
A) NH
3
with NH
3
B) CH
4
with Ne C) Ca
2+
with H
2
O
Molecule acrylonitrile, C
3
H
3
N, shown below.
Acrylonitrile has a higher boiling point (77
o
C) than butane (0
o
C) despite a slightly lower molecular weight, due mainly to what type of intermolecular force? (Butane can be found below)
Intermolecular forces
Describe the strongest intermolecular forces in the following compounds.
a) HCF
3
b) HOCH
3
For each pair of molecules, determine which will have the higher melting point. (Enter 1 or 2 as your answer)
a)
b)
Intermolecular forces: Strength comparison
Based on the three examples below, rank the strength of the intermolecular interaction from highest to lowest.
A) NH
3
with NH
3
B) CH
4
with Ne C) Ca
2+
with H
2
O
Intermolecular forces: Strength
Which of the following intermolecular forces is strongest?
Intermolecular forces
Describe the forces present when U interacts with itself
Practice: Intermolecular Forces
List the following molecules in order of increasing boiling point.
Molecule acrylonitrile, C
3
H
3
N, shown below.
Acrylonitrile has a higher boiling point (77
o
C) than butane (0
o
C) despite a slightly lower molecular weight, due mainly to what type of intermolecular force? (Butane can be found below)
Intermolecular forces
Describe the strongest intermolecular forces in the following compounds.
a) HCF
3
b) HOCH
3
Kevlar is a useful material which is found in bullet proof vests. Kevlar can be synthesized from polymerization of 4-amino benzoic acid, shown below.
What type of intermolecular forces hold the strands of Kevlar together? Choose the strongest one.
Intermolecular forces: Melting point
For the following pair of molecules, determine which will have the higher melting point.
Molecule 1:
VS
Intermolecular forces
Considering likely intermolecular forces, which of the following should have the highest boiling point?
Intermolecular forces
Triiodomethane, CHI
3
, is a yellow solid with a normal melting point of 120
o
C. What is the main intermolecular force in CHI
3
? Which of the listed intermolecular forces is/are at work in this substance?
i. ion-dipole attraction
ii. hydrogen bonding
Intermolecular forces
Arrange the following molecules, H
2
S, HF, NCl
3
, in order of increasing dipole-dipole interactions.
Intermolecular forces: Boiling point
Rank the following compounds in order of increasing boiling point
CH
3
CH
2
OH, HOCH
2
CH
2
OH, CH
3
CH
2
CH
2
CH
2
OH, CH
3
CH
2
OCH
2
CH
3
Intermolecular forces
Describe the intermolecular forces in the following compounds.
a) HCF
3
b) HOCH
3
What kind of intermolecular forces are most important in hexane (C
6
H
14
)?
Intermolecular Forces
Rank the following molecules by strength of intermolecular forces. Show an illustration of the dominant intermolecular force in each.
(a) HCl (g)
(b) CH
3
COOH (l)
Intermolecular Forces
In which of the molecules below is hydrogen bonding an important force that holds the molecules together?
Which molecule do you expect to have the highest boiling point?
Intermolecular Forces: Boiling point
Which molecule do you expect to have the highest boiling point?
Intermolecular Forces: Boiling point
Comparing HF, HCl and HBr, which of the following statements is correct?
Intermolecular Forces: Strength
Which of the following would have the strongest intermolecular forces?
Intermolecular Forces: Boiling Point
Which of the following species would you predict to have the highest boiling point
Intermolecular forces: Boiling Point of Water
Explain why water boils at 100
o
C but the larger ethanol, CH
3
CH
2
OH, boils at 78
o
C.
Intermolecular forces: Properties of liquids
The meniscus in a mercury thermometer points up. Ethanol in a graduated cylinder has meniscus that points down. This is explained by
Which molecule do you expect to have the highest boiling point?
Intermolecular forces: Ranking Boiling Points
Please rank the following compounds from lowest boiling point to highest boiling point.
HOCH
2
CH
2
OH, CH
4
, CH
3
Cl, CH
3
CH
2
CH
3
, CH
3
OH
Intermolecular forces: Boiling point
The boiling point of hydrocarbons increases as the hydrocarbon gets more carbon atoms added to it. Methane CH
4
(-161.5
o
C), ethane C
2
H
6
(-89
o
C), propane C
3
H
8
(-42
o
C) This can best be explained by:
Intermolecular forces: Boiling point
Which molecule do you expect to have the lowest boiling point?
As two Hydrogen (H
2
) molecules approach each other the potential energy
What kind of intermolecular forces are most important in pentane (C
5
H
12
)?
Intermolecular Forces: Boiling point
Water boils at 100
o
C and ammonia (NH
3
) boils at -33
o
C. This is best explained by,
A Na
+
ion interacts with liquid N
2
by
Intermolecular forces: Boiling Point and Size
The boiling point of hydrocarbons increases as the hydrocarbon gets more carbon atoms added to it. Methane CH
4
(-161.5
o
C), ethane C
2
H
6
(-89
o
C), propane C
3
H
8
(-42
o
C) This can best be explained by:
A student mixes HF with PCl
3
at 0
o
C and forms a liquid mixture. What types of intermolecular forces are present between the two components of this liquid mixture, HF and PCl
3
?
Intermolecular Forces
H
2
S is a very smelly compound added to natural gas (CH
4
) to help people detect natural gas leaks. What are the intermolecular forces that hold H
2
S and CH
4
together?
Intermolecular Forces: Surface Tension
What types of intermolecular forces are responsible for the high surface tension in water?
Intermolecular Forces
Which of the following solvents would NOT have ion-dipole interactions with NaCl?
Intermolecular forces: Condensation
When propane is cooled to -42
o
C it condenses from a gas to a liquid. This occurs because
Intermolecular forces: Boiling point
Which of these molecules would you predict to have the highest boiling point?
Ranking Boiling Points
Practice: Ranking Boiling Points
Rank the following compounds in order of increasing boiling point.
Intermolecular Forces
Which of these molecules would be able to hydrogen bond with water?
A. i and iv only
B. i, ii and iv only
Intermolecular Forces
Which of the following lists all the intermolecular interactions that would be present in a solution of propanol and water?
Intermolecular forces
Consider the two molecules, ethylene glycol HOCH
2
CH
2
OH, and glycerol, HOCH
2
CH(OH)CH
2
OH, which
of the following is true:
Intermolecular forces
What are the intermolecular forces that would exist between a molecule of hexane and a molecule of
butanal?
Intermolecular Forces: Hybridization and isomerization
Consider the following three compounds to answer the question below:
Which of the following is/are correct?
Intermolecular forces
Describe the strongest intermolecular forces in the following compounds.
a) HCF
3
b) HOCH
3
Intermolecular Forces: Boiling Point
Rank the following compounds in order of increasing boling point.
Intermolecular Forces: Boiling Point
Rank the following compounds in order of increasing boiling point.
What kind of intermolecular forces are most important in hexane (C
6
H
14
)?