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12 Cards in this Set
- Front
- Back
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What is the definition of Physical Properties? Examples? |
A characteristic of a substance that can be observed with out changing the identity of the substance. Examples: Density, Mass, Volume, vinegar, iodine, texture, melting point, boiling point, color and smell. |
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What is the Density of pure gold if a volume of 2 cm cubed has a mass of 16 grams? |
The density is 8 grams/cm cubed. |
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What is the density of 20 mL of a liquid if it has a mass of 26 grams? |
1.3 grams/cm cubed |
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What is the difference between a physical and chemical change? |
Physical change is a change in any physical property of a substance. (Doesn't change what it is.) Chemical change: The change of 1 substance into another substance is a chemical change. (New substance.) |
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Explain why changing from one state to another is a physical change NOT a chemical change? |
The chemical composition stays the same and the molecule doesn't change. |
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What is Melting point? |
Melting point is the process by which a solid becomes a liquid. |
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What are 2 examples of melting point? |
Chocolate and mercury |
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What is evaporation? Examples? |
Change from its liquid state to its gas state. Example: Boiling water or the freezer |
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What is sublimation? Example? |
Changes from its solid state to its gas state. Example: Dry ice |
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What happens during boiling? |
A liquid turns to gas. |
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How does condensation happens? |
Condensation happens or occurs when a gas becomes a liquid. |
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In order to determine an objects density you need to find the __________ and __________. |
In order to determine an objects density you need to find the mass and volume. |
