Gases - Topic 7

When the atmospheric pressure equals the equilibrium vapor pressure ___ occurs.

• freezing
• melting
• boiling
• sublimation

Tags

NGSS.MS-PS1-4

water have a low vapor pressure because

• it has strong london dispersion forces acting between its molecules
• it has strong hydrogen bonds acting between its molecules
• it has a weaker force of attraction between its molecules
• it is very volatile

Tags

NGSS.HS-PS1-3

The lower the boiling point, the ___ the intermolecular forces.

• stronger
• weaker

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Liquids with weak intermolecular forces

• contain a lot of kinetic energy
• easily evaporate
• cannot diffuse
• freeze easily

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the boiling point of water

• 0 C
• 100 F
• 50 C
• 100 C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is water's melting point?

• 32 C
• 0 C
• 32 F
• 0 F

Tags

NGSS.MS-PS1-4

Lowest possible temperature, all motion of particles stops

• absolute Kelvin
• absolute zero
• ideal temperature
• Avogadro's Law

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

• 2 atm
• 4 atm
• 3 atm
• 9 atm

The partial pressure of gas X is 340 torr. The partial pressure of gas Y is 264 torr. The partial pressure of gas Z is 100 torr. What is the total pressure exerted by the gases in this system? 

• 76 torr
• 440 torr
• 604 torr
• 704 torr

Which of the following gases will effuse most slowly under the same physical conditions?
Don't forget to check for diatomics!

• Hydrogen
• Chlorine
• Ammonia (NH₃)
• Bromine