Chapter 10 States of Matter

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

• stronger
• weaker

Tags

NGSS.MS-PS1-4

What is the mass of a sample of Ni, which melts after 3120 J of heat is added (∆Hf = 298 J/g).

• 5.23 g
• 0.178 g
• 0.09 g
• 10.5 g

Tags

NGSS.HS-PS3-1

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

• freezing
• melting
• boiling
• sublimation

Tags

NGSS.MS-PS1-4

If the rate of melting equals the rate of freezing...

• there is more liquid
• there is more solid
• the system is in equilibrium
•  the system is working towards equilibrium

Tags

NGSS.MS-PS1-4

Which process is exothermic?

• melting
• vaporization
• condensation
• sublimation

A substance can exist as a gas, liquid and solid at the ___

• critical point
• critical pressure
• triple point
• critical temperature

As atmospheric pressure decreases (like at the top of a mountain), boiling point___

• decreases
• increases
• decreases then increases
• increases then decreases

During a phase change, the temperature

• increases
• decreases
• fluctuates
• stays the same

The strength of intermolecular forces varies between liquids, therefore they will have

• different equilibrium vapor pressure
• the same equilibrium vapor pressure
• different temperatures
• the same amount of kinetic energy

Tags

NGSS.HS-PS1-3

Glass (ex: volcanic glass or obsidian) is a crystalline solid.

• True
• False