Unit 4 Flashcards by Gabriella Ghale

Q

Releases heat

A

exothermic

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Q

Absorbs heat

A

endothermic

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Q

Ex: freezing an ice cube

A

exothermic

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Q

Ex: melting an ice cube

A

endothermic

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Q

Ex: Substance becomes warmer

A

exothermic

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Q

Ex: substance becomes colder

A

endothermic

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Q

Ex: cooking/baking

A

endothermic

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Q

Ex: water condensation

A

exothermic

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Q

surrounding —> system

A

endothermic

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Q

system —> surrounding

A

exothermic

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Q

A + B —> AB

A

synthesis

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Q

has one product

A

synthesis

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Q

AB —> A + B

A

decomposition

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Q

has one reactant

A

decomposition

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Q

A + BC —> B + AC

A

Single replacement

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Q

metal replaces metal
nonmetal replaces nonmetal

A

single replacement

Q

AB + CD —> AD + CB

A

Double replacement

Q

insoluable

A

(s)

Q

soluable

A

(aq)

Q

AB + O2 —> CO2 + H2O

A

combustion

Q

products are always carbon dioxide and water

A

combustion

Q

always exothermic reactions (heat/burning)

A

combustion

Q

3 things needed to start a fire

A

-fuel
-oxygen
-spark to ignite the reaction

Q

7 diatomic elements

A

hydrogen
nitrogen
oxygen
fluorine
chlorine
iodine
bromine

Q

Decomposition exceptions

A

CO3
ClO3

Q

ClO3

A

Al(ClO3) —> O2 + AlCl

Q

CO3

A

CaCO3 —> CO2 + CaO