Observe the heat curve above. Between points X and Y, what 2 things would be observed? Choose the 2 statements that are correct.

a
The temperature is increasing as the phase change occurs.
b
The temperature remains constant as the phase change occurs.
c
Only the solid state of the substance would be present.
d
Only the gaseous state of the substance would be present.
e
The temperature is decreasing as the phase change occurs.
f
Both liquid and gaseous states of the substance would be present.
g
Both liquid and solid states of the substance would be present.
h
Only the liquid state of the substance would be present.

The correct statements are:

b) The temperature remains constant as the phase change occurs.
g) Both liquid and solid states of the substance would be present.