Heating and Cooling Curves

In which region(s) of the graph does a phase change occur?

• Region 1, 3, & 5
• Region 2 & 4
• Region 1 only
• Region 1 & 2

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Chem 2.1.2

In which region(s) of the graph does boiling take place?

• Region 2
• Region 3
• Region 4
• Region 5

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Chem 2.1.2

What is the freezing point of the substance?

• 0^oC

• 60^oC

• 120^oC

• 180^oC

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Chem 2.1.2

The graph shows the heating curves for benzene and water.

Which substance has a higher boiling point?

• benzene

• water

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Chem 2.1.2

The graph shows the heating curves for benzene and water.

Which substance has a higher melting point?

• benzene

• water

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Chem 2.1.2

Given the heating curve of a solid being heated at a constant rate, how much total time was required to boil this substance after it reached its melting point?

• 3 minutes

• 4 minutes

• 10 minutes

• 14 minutes

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Chem 2.1.2

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

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Chem 2.1.2

Which segment of the graph represents both melting and freezing?

• AB

• BC

• DE

• EF

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Chem 2.1.2

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

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Chem 2.1.2

The graph shows a cooling curve for an unknown substance.  What is happening during segment DE?

• boiling
• condensation
• freezing
• melting

Tags

Chem 2.1.2