Heating Curve Intro

NaCl was heated starting at an initial temperature of 0°C. The heating curve is shown in the picture. What is the melting point of this substance?

• 0°C

• 801°C

• 1000°C

• 1465°C

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

In which region(s) does temperature increase?

• Region C only

• Regions B and D

• Regions A, C, and E

• Regions A and B

Tags

NGSS.MS-PS1-4

In a heating curve, diagonal lines indicate temperature is __________, while flat lines indicate temperature is __________.

• Constant, changing

• Changing, constant

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The melting point of the sample is

• -60 ºC

• 20 ºC

• 60 ºC

• 100 ºC

Tags

NGSS.MS-PS1-4

What part of the curve represent a mixed liquid/vapor phase of substance X?

• I

• II

• III

• IV

• V

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What part of the curve represent a mixed solid/liquid phase of substance X?

• I

• II

• III

• IV

• V

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What part of the curve represent a mixed solid/liquid phase of substance X?

• I

• II

• III

• IV

• V

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

Which of the following terms identifies the change from a liquid to gas?

• Vaporization

• Condensation

• Deposition

• Sublimation

Tags

NGSS.MS-PS1-4

What is happening to the particles in the substance between points D and E?

• Melting

• Freezing

• Vaporizing

• Sublimating

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4