Gases

Describe the substance between letters D and E. 

• Gas
• Liquid
• Melting
• Evaporating

The melting point of the sample is

• -60 ºC

• -100 ºC

• 60 ºC

• 100 ºC

Given the heating curve of a solid being heated at a constant rate, what is the boiling point of this substance?

• 20°C

• 50°C

• 110°C

• 170°C

Given the heating curve for water, during which line segment could I find water in both the solid and liquid phase at the same time?

• AB

• BC

• CD

• DE

• EF

This curve indicates what about the heat energy?

• Heat energy is being added or absorbed

• Heat energy is being released

In which region(s) of the graph would the substance be melting?

• No melting occurs on this graph

• Region C-E

• Region E-G

• Region G-I

• Region I-K

What is the freezing point of the substance?

• 0^oC

• 60^oC

• 120^oC

• 180^oC

5. What is it called when a solid turns directly into a gas?

• Sublimation
• Condensation
• Liquid

Where on the graph are phase changes taking place?

• 1

• 2

• 3

• 4

• 5

What letter on the diagram represents a gas?

• A

• B

• C

• D