Question

The changes that occur when a substance changes state are shown below.

W
х
solid liquid gas
Z
Y
Which process, W, X, Y or Z, is occurring in the following four situations?
1
Butter melts on a warm day.
2
Water condenses on a cold surface.
3
The volume of liquid ethanol in an open beaker reduces.
4
Ice forms inside a freezer.
1
2
3
4
W
А
Y
X
х
Y
w
B
N N 33
Х
Y
с
z
Y
z
D
Х

Answer 1

Answer:

They are reversible changes and do not involve any changes in the chemical makeup of the matter. Common changes of the state include melting, freezing, sublimation, deposition, condensation, and vaporization.

Explanation:

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