To a Between 9 and 13 minutes, the added energy increases the
of the substance. During the
time from point D to point E, the liquid is
By point E, the substance is completely in the
phase. Material in this phase has
volume and
shape. The energy put to the substance between minutes 13 and 18 converted the substance from a
state. This heat energy is called the latent heat of vaporization. (An
interesting fact.) Beyond point E, the substance is still in the
phase, but the molecules
are moving
as indicated by
the increasing temperature.
Substance Melting point Boiling point
100 °C
Which of these three substances was likely used in this
Bolognium
Unobtainium
phase change experiment?
40°C
140°C
Foosium
70°C
20°C
140°C
BONUS: For water, the value for the latent heat of vaporization is 6.8 times greater than the latent heat of fusion. Imagine we were
wedding heat at a constant rate to a block of ice in a beaker on a hot plate, and it took 4 minutes for the ice to melt completely. How long
would it take, after the water started boling, for the besker to be completely empek (the liquid water totally converted to water vapor