Heating Cooling Curves

The following image shows the temperature change of a substance as thermal energy is released over time. Select all regions where the phase is changing

• AB

• BC

• CD

• DE

• E to the end

Tags

NGSS.MS-PS1-4

This curve represents a _____ curve because the temperature is ______​ (a)   ​ (b)  

• heating

• increasing

• cooling

• decreasing

Tags

NGSS.MS-PS1-4

Select 2 terms that represent PHASE CHANGES that can happen if a sample of matter absorbs thermal energy

• melting

• gas

• freezing

• liquid

• boiling

Tags

NGSS.MS-PS1-4

On a heating or cooling curve, the substance is a single state of matter (solid, liquid, or gas) when the line is

• sloped (going up or down at an angle)

• horizontal (flat)

Tags

NGSS.MS-PS1-4

• 150

• 100

• freezing

• condensation

• boiling

Tags

NGSS.MS-PS1-4

Region QR represents a substance in the liquid phase. What does region RS represent?

• melting

• boiling

• solid

• gas

Tags

NGSS.MS-PS1-4

Region QR represents a substance in the liquid phase. What does region ST represent?

• melting

• boiling

• solid

• gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Region QR represents a substance in the liquid phase. Is this substance possibly water? How do you know?

​ (a)   ​ (b)  

• yes

• no

• This substance boils at 100 degrees C

• This substance freezes at 40 degrees C

• This substance boils at 110 degrees C

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If Region AB is a gas, identify BC and C to the end.

a

b

condensation

boiling

solid

freezing

liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which phase change occurs at the flat portions of a heating curve?

• Melting and boiling

• Freezing and condensation

• Sublimation and deposition

• Evaporation and freezing

Tags

NGSS.MS-PS1-4