AP Chemistry Heating Curve

Where on a heating curve graph are the phase/state changes?

• slopes

• plateaus

Where on a heating curve graph does kinetic energy and temperature both change?

• slopes

• plateaus

Where on a heating curve graph is there no temperature change?

• at the slopes when phase/state changes occur

• at the plateaus when phase/state changes occur

Given the heating curve of water, what is happening to potential and kinetic energy during segment CD?

• the potential energy and kinetic energy both increase

• the potential energy increases while the kinetic energy decreases

• the potential energy is constant while the kinetic energy increases

• the potential energy increases while the kinetic energy is constant

Tags

NGSS.HS-PS3-2

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

Tags

NGSS.HS-PS3-4

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

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Given the heating curve of a solid being heated at a constant rate, during which time segment was there a change in kinetic energy?

• between min 3 and 4

• between min 4 and 5

• between min 10 and 12

• between minutes 14 and 15

Tags

NGSS.HS-PS3-2

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

Tags

NGSS.HS-PS3-4

NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture.During which segments of the diagram is potential energy constant? (Check all that apply)

• AB

• BC

• CD

• DE

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture.During which segments of the diagram is potential energy increasing? (Check all that apply)

• AB

• BC

• CD

• DE

Tags

NGSS.HS-PS1-4