Unit 8.3 - Phase Change MC Practice

During which two processes does a substance release

energy?

• freezing and condensation

• freezing and melting

• evaporation and condensation

• evaporation and melting

The heating curve above represents a sample of a

substance starting as a solid below its melting point

and being heated over a period of time.

• Both potential energy and average kinetic energy

  increase

• Both potential energy and average kinetic energy

  decrease.

• Potential energy increases and average kinetic

  energy remains the same.

• Potential energy remains the same and average

  kinetic energy increases.

Tags

NGSS.HS-PS3-2

Which phase change is exothermic?

• H₂O_(s) --> H₂O_(l)

• H₂O_(l) --> H₂O_(s)

• H₂O_(s) --> H₂O_(g)

• H₂O_(l) --> H₂O_(g)

Tags

NGSS.MS-PS1-4

• AB and BC

• AB and CD

• DE and BC

• DE and EF

Tags

NGSS.HS-PS3-4

Tags

NGSS.HS-PS3-4

Which physical changes are endothermic?

• melting and freezing

• melting and evaporating

• condensation and sublimation

• condensation and deposition

Tags

NGSS.MS-PS1-4

• AB and BC

• AB and CD

• BC and DE

• DE and EF

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the melting point of this substance?

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

• AB

• BC

• CD

• DE

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Tags

NGSS.MS-PS1-4