Heating curve worksheet: label the melting and boiling points

An example figure from the Heating and Cooling Curve generator.

Heating curve of an unknown substance from 0 °C to 160 °C, its corners lettered A to F, with blank lines for the segment labels and by the temperature axis at each plateau — The temperature of an unknown substance, Substance X, heated steadily from 0 °C to 160 °C, against time, with plateaus at 40 °C and 120 °C. Its corners are lettered A to F, and every segment and both plateaus’ dashed lines have blank lines, for students to name each state and change and to mark the melting and boiling points.

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Answer key

Substance X: melting point 40 °C, boiling point 120 °C
A–B: Solid warms from 0 °C to 40 °C
B–C: Melting at 40 °C
C–D: Liquid warms from 40 °C to 120 °C
D–E: Boiling at 120 °C
E–F: Gas warms from 120 °C to 160 °C

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