DATE: A cooling curve is the opposite of a heating curve.
It shows how the temperature of a substance
changes with time, as it is cooled from a gas to a
solid. Here is the cooling curve for one substance:
gas
Temperature / °C
78
liquid
no
JOTOqid
to be
04
-15-
1
solid
Time
Bib 25
a What is the state of the substance at room
temperature (20 °C)?
b Use the list of melting and boiling points on
page 9 to identify the substance.
c Sketch a cooling curve for pure water. d
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