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What happens to substances as they lose or gain energy?
As substances lose energy, they tend to decrease in temperature and may change state (e.g. solid to liquid). Conversely, as substances gain energy, they tend to increase in temperature and may change state in the opposite direction (e.g. liquid to gas).
What happens to a solid when is heated?
A substance in the solid phase will typically expand when heated. Most substances when heated sufficiently will melt into a liquid, assuming that they do not combust or sublimate.
What kinds of changes in substances are always physical change?
The kinds of changes in substances that are always physical changes are changes in the state. This is the change from solid, to liquid and then to gas and the reverse.
What happens to most substances when they are heated?
When substances are heated, typically their molecules gain energy and begin to move more rapidly. This increased movement can cause the substance to expand, change phase (from solid to liquid or gas), or even chemically react to form new substances. The specific changes depend on the substance's properties.
Do substances absorb or release heat energy as then change from a liquid to the solid phase?
When a substance changes from a liquid to a solid it releases energy. (You take the heat out)
What is a physical change that occurs because of a decrease in temperature?
When the temperature decreases, substances can change phase from a gas to a liquid or from a liquid to a solid. This is known as condensation or freezing.
What are some characteristics for a physical change?
A physical change is a change that can be reversed easily and no new substances are made. Examples are state changes ie. solid to liquid or liquid to gas.
Change from a solid to a liquid is called?
1. in most pure substances, melting occurs at a specific Temperature called the melting point. 2. the change of state from liquid to solid is called freezing (solidification) 3. the change from a liquid to gas is called Condensation.
How are the state changes of similar to the states changes in most other substances?
These changes of state are: solid to liquid, liquid to gas, gas to liquid, liquid to solid, solid to gas, gas to solid. The majority of substances have these state of matter changes.
What of a liquid to a solid?
change of a liquid to a solid
How are the state changes of water similar to the state changes in most other substances?
These changes of state are: solid to liquid, liquid to gas, gas to liquid, liquid to solid, solid to gas, gas to solid. The majority of substances have these state of matter changes.
What is the change for liquid and solid?
The change from liquid to solid is called freezing.
