3.2 Temperature and time graphs

Which of the following shows a tray of water being put in the freezer?

• A
• B
• C
• D

Which of the following pictures shows a piece of ice being heated from -2 C to 25 C?

• A
• B
• C
• D

Which of the following shows ice being heating on the stove until it all boils away?

• A
• B
• C
• D

What does picture D show?

• Particles being heated and undergoing one phase change.
• Particles being cooled and going through one phase change.
• Particles being heated and undergoing two phase changes.
• Particles being cooled and undergoing two phase changes.

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

In which segment is the kinetic energy remaining constant?

• A-B
• B-C
• C-D
• E-F

What state(s) of matter are present at D-E?

• Solid-liquid
• Liquid
• Liquid-gas
• Gas-Solid

True or false: melting and freezing occur at the same temperature!

• True
• False
• I don't know

A substance's heating curve is shown in the graph.  What is its boiling point?

• 100 C
• 60 C
• 80 C
• 20 C

The melting point of the sample is

• -60 ºC

• -100 ºC

• 60 ºC

• 100 ºC