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Physical and Chemical Properties and Changes
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Chemistry
Mastering Chemistry
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20 Terms
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EX
flammability, oxidation, creation of gas or solid precipate
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color, odor, taste, density
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EX
7 liters of water, 56 kg of cake
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EX
ice melts at 0 degrees C, lead has a density of 11.34 g/CM^3
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Physical Change
Does not result in new substance
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EX
if you melt ice you still have water that can be frozen back to ice
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Chemical Changes
when two substances react, a new substance is formed
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burning paper or baking a cake
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Matter
Anything that has mass and takes up space
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Mass
How much physical "stuff" in a piece of matter
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Weight
The gravitational pull on a piece of mass
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Solid
Fixed volume and fixed shape
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Gas
Will expand and can be compressed
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Liquid
Fixed volume, takes shape of container.
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Physical properties
characteristics that can be observed or measured without changing the substance.
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Intensive properties
Type of physical property that does not depend on the amount of the given substance.
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Extensive properties
Type of physical property that depends on how much of the substance you have.
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Chemical Property
Characteristics that are revealed only when the composition of the substance changes through a chemical reaction.
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Physical Change
Does not result in new substance.
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Chemical Changes
when two substances react, a new substance is formed.
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