We’re being asked which of the following diagrams best represents the dry ice after it has sublimed into a gas.
Recall that sublimation is a phase change from solid to gas:
Let’s first define a physical change and a chemical change.
Physical change → there is a change in a matter as it goes from one physical state to another.
Chemical change → atoms rearrange themselves to create a new substance.
This means that the chemical composition of dry ice, CO2 will not change when it sublimes only its physical state:
The following diagram represents solid carbon dioxide, also known as dry ice.
Which of the following diagrams best represents the dry ice after it has sublimed into a gas?
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