Heating Curve Graphs

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

Tags

NGSS.HS-PS3-2

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 kinetic energy during segment CD?

• the kinetic energy increases

• the kinetic energy decreases

• kinetic energy is constant

• kinetic energy can both increase and decrease

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

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-PS3-2

NaCl(s) was cooled down to 0°C starting at an initial temperature of 1465°C. The heating curve is shown in the graph. During which segments of the diagram are intermolecular forces getting stronger? (Select all that apply)

• segment D-C

• segment C-B

• segment B-A

• segment E-D

NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture. Which phase change is occurring during segment DE?

• solidification

• fusion

• vaporization

• condensation

Tags

NGSS.HS-PS3-4

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?

• segment A-B

• segment B-C

• segment C-D

• segment D-E

• segment E-F

Tags

NGSS.HS-PS3-2

NGSS.HS-ESS2-5

What is the melting point of the substance given the heating curve? Just type the number and no unit. Don't use any sig figs or decimals.

(a)