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26 Cards in this Set
- Front
- Back
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Properties |
The characteristics that distinguish one substance from another |
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In chemistry, we categorize properties into two different types: |
Physical and Chemical |
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Physical Property |
is one that a substance displays without changing its composition. |
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Chemical Property |
is one that substance displays only through changing its composition. |
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Example of a physical property of a substance? |
Boiling point of water - a physical property - 100 degrees Celsius. When water boils, it changes from a liquid to a gas, but the gas is still water. |
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Example of a chemical property? |
The characteristic odor of gasoline is a physical property - gasoline does not change its composition when it exhibits its odor. On the other hand, the flammability of gasoline is a chemical property - gasoline does change its composition when it burns. |
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A chemical change is____________. |
A reactant becoming a product. |
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The statement "matter is neither created nor destroyed in a chemical reaction" is best classified as _________. |
A Law |
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Which energy unit is most likely to appear on an electric bill? |
kWh |
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Chemical Reaction that release heat? |
Exothermic |
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Which temperature scale avoids negative temperature? |
Kelvin |
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Which state(s) have never recorded a temperature above 100 degrees Fahrenheit? |
Alaska and Hawaii |
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Decanting |
Carefully pouring off |
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Distillation |
Heat mixture to boil off the more volatile |
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Volatile |
The more easily vaporized - liquid |
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Filtration |
If mixture is composed of a solid and a liquid; we pour the mixture through a filter paper usually held in a funnel |
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Exothermic |
Chemical Reaction that releases energy |
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Endothermic |
Chemical Reaction that absorb energy |
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Temperature |
Measure of its thermal energy |
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Heat |
Has units of energy; is the transfer or exchange of thermal energy caused by a temperature difference. |
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Fahrenheit Scale |
Water freezes @ 32 degrees and boils @ 212 degrees. Room temperature is approximately 72 degrees.
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Celsius Scale |
Water freezes at 0 degrees and boils at 100 degrees. Room temperature is approximately 22 degrees. |
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Kelvin Scale |
Avoids negative temperatures by assigning 0 degrees K to the coldest temperature possible, absolute zero. |
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Heat Capacity |
of a substance is the quantity of heat (usually in Joules) |
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Specific Heat Capacity |
amount of substance is expressed in grams |
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Triangle is an equation used to calculate heat represents? |
a change in |
