Gases, Liquids, and Solids - Section 2

Gases, Liquids, and Solids - Section 2

Poll

Where are you on the scale?

• 1

• 2

• 3

• 4

Heating/Cooling Curve

We were introduced to this type of diagram earlier in the year. We will just do a quick review as today we will also show you another diagram. Pay attention to the unit labels on the axes.

Multiple Choice

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

• 100 C
• 60 C
• 80 C
• 20 C

Multiple Choice

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

• True

• False

Multiple Choice

What state of matter is segment 5?

• Solid
• Liquid
• Gas
• Plasma

Multiple Choice

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

Multiple Choice

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

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

Multiple Choice

In which segment is the kinetic energy remaining constant?

• A-B
• B-C
• C-D
• E-F

Phase Change Diagrams

• The axis are labeled differently

• Pressure vs temperature

• Note the locations of the different states of matter.

• Note the phase change locations as well.

Multiple Choice

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

• condensation

• evaporation

• melting

• freezing

Multiple Choice

What state of matter is Y?

• solid 
• liquid
• gas
• supercritical fluid

Multiple Choice

What state of matter is X?

• solid 
• liquid
• gas
• supercritical fluid

Multiple Choice

At 10 atm, dry ice is heated from -100 °C to 30 °C.  What changes occur?

• freezing, then condensation
• melting only
• sublimation only
• melting, then boiling

Multiple Choice

Water exists as a _____________ at 700 mmHg and 50 °C.

• solid

• liquid

• gas

• supercritical fluid

Multiple Choice

Water exists as a _____________ at 700 mmHg and 50 °C.

• solid

• liquid

• gas

• supercritical fluid