Phase Changes and Heat Calculations Bell Review #2

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

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

• 100 C

• 60 C

• 80 C

• 20 C

From point A to point E, the sample is going through an

• exothermic process by releasing heat to the surroundings

• exothermic process by absorbing heat from the surroundings

• endothermic process by releasing heat to the surroundings

• endothermic process by absorbing heat from the surroundings

NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture. What is the melting point of this substance?

• 0°C

• 801°C

• 1000°C

• 1465°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

In which region(s) does temperature remain constant?

• Region 1, 3, & 5

• Region 2 & 4

• Region 1 only

• Region 1 & 2

What is the freezing point of the substance?

• 0^oC

• 60^oC

• 120^oC

• 180^oC

From point A to point F, the sample is going through an __________ process by __________.

• exothermic, releasing heat to the surroundings

• exothermic, absorbing heat from the surroundings

• endothermic, releasing heat to the surroundings

• endothermic, absorbing heat from the surroundings