Phase Diagram and Heat Curve

What line segment represents only the solid state? (Diagram F)

• A-B

• B-C

• C-D

• D-E

Between which points is the temperature of the substance remaining constant? (Diagram F)

• A-B only.

• A-B, C-D, E-F

• B-C only.

• B-C, D-E

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? (Diagram B)

• 100 C

• 60 C

• 80 C

• 20 C

Are the particles moving faster or slower as time goes on? (Diagram F)

• Faster

• Slower

Is the substance gaining or losing energy? (Diagram D)

• Gaining

• Losing

Which line segment demonstrates vaporization occurring? (Diagram E)

• B-C

• C-D

• D-E

• E-F

How long does it take this substance to change from a liquid to a gas? (Diagram E)

• 1 minute

• 2 minutes

• 10 minutes

• 15 minutes

What will occur when the substance transitions from B to A? (Diagram A)

• condensation

• evaporation

• melting

• freezing

What will occur when the substance changes from 0^o C to 100^oC at a constant pressure of 30 atm? (Diagram A)

• condensation

• evaporation

• melting

• freezing