Question 1

In which of the following processes are intramolecular forces broken?

Accepted Answer

H2O(l) --> H2(g) + O2(g)

Answer

H2O(s) -->  H2O(g)

Answer

I2(s) --> I2(g)

Answer

NaCl(s) --> NaCl(l)

Question 2

At 298 K and 1 atm, Br2 is a liquid  and Cl2 is a gas. Those observations provide evidence that under the given conditions, the

Accepted Answer

forces among Br2 molecules are stronger than those among Cl2 molecules

Answer

forces among Cl2 molecules are stronger than the Cl−Cl bond

Answer

Cl−Cl bond is stronger than the Br−Br bond

Answer

Br−Br bond is stronger than the Cl−Cl bond

Question 3

In the diagram above, which of the labeled arrows identifies hydrogen bonding in water?

Accepted Answer

D

Answer

C

Answer

A

Answer

B

Question 4

In which of the following liquids do the intermolecular forces include dipole-dipole forces?

Accepted Answer

CH2F2

Answer

CF4

Answer

CH4

Answer

F2

Question 5

As time increases, what phase change is happening at point D on the curve above?

Accepted Answer

boiling

Answer

melting

Answer

heating

Answer

freezing

Question 6

Indicate the main/dominant type of IMF capabilities  in O2.

Accepted Answer

London Dispersion forces

Answer

Hydrogen Bonding

Answer

dipole dipole forces

Answer

double bond forces

Question 7

Indicate the main/dominant type of IMFs capabilities  in NH3.

Accepted Answer

Hydrogen Bonding

Answer

Dipole Dipole forces

Answer

Polar Covalent Forces

Answer

London Dispersion Forces

Question 8

How does boiling point relate to the intermolecular forces?

Accepted Answer

Lower b.p., lower intermolecular forces

Answer

Higher b.p., lower  intermolecular forces

Answer

Higher b.p., moderate intermolecular forces

Answer

Lower b.p., higher intermolecular forces

Question 9

The particles in a liquid are usually

Accepted Answer

closer together and lower in energy than those in a gas.

Answer

farther apart and lower in energy than those in a solid.

Answer

closer together and lower in energy than those in a solid.

Answer

farther apart and higher in energy than those in a gas.

Question 10

The atm pressure in Denver is 0.83 atm (normal boiling is at 1.0atm), so water boils at______ in Dever.

Accepted Answer

95 oC

Answer

100 oC

Answer

110 oC

Answer

0 oC

Question 11

According to the graph above, which liquid has strongest IMF capabilities

Accepted Answer

ethylene glycol

Answer

water

Answer

diethyl ether

Answer

ethyl alcohol

Question 12

A ranking of the IMFS in terms of their general strengths (weakest to highest) would be

Accepted Answer

london dispersion, dipole-dipole, hydrogen bonding

Answer

london dispersion, hydrogen bonding, dipole-dipole

Answer

hydrogen bonding, dipole-dipole, london dispersion

Answer

hydrogen bonding, london dispersion, dipole-dipole

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