Phases, Phase Changes, & Heat Curve

When we add heat to a substance and the graph plateaus, there is no temperature change because energy is needed to

• It is a phase change

• The kinetic energy is increasing

• The kinetic energy is decreasing

• nothing happens.

Tags

NGSS.MS-PS1-4

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

Tags

NGSS.MS-PS1-4

Between which points is the temperature of the substance remaining constant?

• A-B only. 
• A-B, C-D, E-F
• B-C only. 
• B-C, D-E

Tags

NGSS.MS-PS1-4

Between which two points is does melting and freezing happen?

• A <----> B

• B <----> C

• C <----> D

• D <----> E

• E <----> F

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The melting point of the sample is

• -60 ºC

• -100 ºC

• 60 ºC

• 100 ºC

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

At what temperature does water change from a liquid to a gas?

• 0˚C freezing point
• 100˚C boiling point
• 100˚C melting point
• 0˚C melting point

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When does condensation happen?

• solid to liquid
• liquid to gas
• gas to liquid
• solid to gas

Tags

NGSS.MS-PS1-4

In which region(s) of the heating curve would water be a liquid and a gas at the same time?

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Easily compressed

• Solid

• Liquid

• Gas

Tags

NGSS.5-PS1-1