Chemistry Practice Problems Physical & Chemical Changes Practice Problems Solution: We put a drop of water into a container and seal t...

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Solution: We put a drop of water into a container and seal the container. The drop of water then vaporizes.Does its contents change upon vaporization?

Problem

We put a drop of water into a container and seal the container. The drop of water then vaporizes.

Does its contents change upon vaporization?

Solution

We’re being asked to determine what would happen to the contents of a sealed container containing a drop of water which then vaporizes.

Let’s first define a physical change 

Physical change → there is a change in a matter as it goes from one physical state to another (e.g. vaporization, a physical change from liquid to gas)

In physical changes:

  • particles just don't disappear or get created, rather their arrangements change
  • in any change involving matter, all of the matter must be accounted for. Matter does not turn into or appear from energy
  • particles are rearranged to create substances different from the original
  • there is no change in weight when substances move in and out of the gas state.
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