Phases Changes, Diagrams, Heat of Fusion & Vaporization

___________ is measured by the unit Joules.

• Heat energy
• Temperature
• Specific heat

How many Joules of energy are required to make 100 grams of ice at 0 ^οC completely melt?

• 200 J

• 400 J

• 33,400 J

• 2,000,000 J

How many Joules of energy are required to condense 45 grams of steam?

• 101700 J

• 400 J

• 33,400 J

• 15030 J

What mass of water will release 675 J upon freezing?

• 225450g g

• 2.02g

• 1525500g

• 0.299g

What type of process is happening as one moves along line segment B toward the right?

• An endothermic Process
• An exothermic Process
• The calorimetry process
• Nuclear fusion

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

When the temperature of matter decreases the particles ...

• speed up and move farther apart
• speed up and move closer together
• slow down and move farther apart
• slow down and move closer together

Tags

NGSS.MS-PS1-4

When a substance melts, the kinetic energy _____________.

• decreases

• stays the same

• increases

• decreases then increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why do some substances float on water?

• Because they are more dense than water

• Because they are warmer than water

• Because they are less dense than water

• Because they are cooler than water

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

What will occur when the substance transitions from B to A?

• condensation

• evaporation

• melting

• freezing

Tags

NGSS.MS-PS1-4