Title: Chapter 10: Liquids and Solids
Course: Test

Q: Which statement accurately depicts what happens to water on the molecular level in a tea pot when it begins to boil?
- The molecules begin to move farther apart decreasing their intermolecular forces and they escape the liquid state to enter the gas state.
- The molecules begin to move closer together overcoming their intermolecular forces which holds them together and they escape the liquid state to enter the gas state.
- The molecules begin to move farther apart decreasing their intramolecular forces and they escape the liquid state to enter the gas state.
A: The molecules begin to move farther apart decreasing their intermolecular forces and they escape the liquid state to enter the gas state.

Q: At what temperature does water boil in kelvin?
- 373.15 K
- 273.15 K
- 173.15 K
A: 373.15 K

Q: Which phases change is an exothermic process?
- freezing
- melting
- evaporation
A: freezing

Q: Which phases change is an endothermic process?
- freezing
- evaporation
- deposition
A: evaporation

Q: Water changing from ice to a liquid is an example of _____.
- melting
- evaporation
- freezing
A: melting

Q: Sodium chloride changing from a solid to a gas is an example of _____.
- evaporation
- sublimation
- boiling
A: sublimation

Q: What predominate intermolecular force is in HCl?
- dipole-dipole
- hydrogen bonding
- London forces
A: dipole-dipole

Q: What predominate intermolecular force is in NH_3?
- dipole-dipole
- hydrogen bonding
- London forces
A: hydrogen bonding

Q: What predominate intermolecular force is in CO_2?
- dipole-dipole
- hydrogen bonding
- London forces
A: London forces

Q: What predominate intermolecular force is in CH_3OH?
- dipole-dipole
- hydrogen bonding
- London forces
A: hydrogen bonding

Q: What predominate intermolecular force is in CH_3CH_2CH_3?
- dipole-dipole
- hydrogen bonding
- London forces
A: London forces

Q: Based off of the principles of intermolecular forces, which liquid has a higher vapor pressure?
- water
- methanol
- ethyl ether
A: ethyl ether

Q: Based off of the principles of intermolecular forces, which liquid has the lowest vapor pressure?
- water
- ethanol
- ethyl ether
A: water

Q: If it takes you 10 min. to boil an egg to perfection at sea level, how long would it take to boil an egg to your taste in the Carpathian Mountains at elevations of 8,500 ft?
- The boiling point of water in the Carpathian Mountains is less than 100 °C because of lower atmospheric pressure which results in reduced intermolecular forces, so it would take a longer time to boil the egg.
- The boiling point of water in the Carpathian Mountains is greater than 100 °C because of lower atmospheric pressure which results in increased intermolecular forces, so it would take less time to boil the egg.
- The boiling point of water is always 100 °C regardless of elevation so it would take the same amount of time to boil the egg.
A: The boiling point of water in the Carpathian Mountains is less than 100 °C because of lower atmospheric pressure which results in reduced intermolecular forces, so it would take a longer time to boil the egg.

Q: Which alkane would have a higher boiling point?
- heptane
- ethane
- pentane
A: heptane

Q: Which alkane would have a lower boiling point?
- CH_3CH_3
- CH_4
- CH_3CH_2CH_3
A: CH_4

Q: Which of the following halogens would have stronger intermolecular forces?
- Br_2
- Cl_2
- I_2
A: I_2

Q: Which of the following molecules would have weaker intermolecular forces?
- I_2
- NH_3
- H_2O
A: I_2