Processes amp Reactions Exothermic Endothermic Process Heat exiting a substance Ex water freezing Physical change Heat entering a substance Ex water evaporating Physical change Reaction ID: 274681
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Slide1
Endothermic/Exothermic Processes & ReactionsSlide2
Exothermic
Endothermic
Process
Heat
exiting a substance
Ex: water freezing
Physical change
Heat entering a substance
Ex: water evaporating
Physical
change
Reaction
Chemical
reaction where energy is released in the form of light or heat
Feels hot – chemical bonds forming
Temp. change - warmer
Ex: Calcium & water
Chemical
reaction that absorbs energy from its surroundings
Feels cold – chemical bonds breaking
Temp. change - colder
Ex: Vinegar & baking sodaSlide3
Reaction #1 - Endothermic
Baking Soda & Citric AcidReaction #2 - Exothermic
Steel
Wool & Vinegar
Reaction
#3 - Exothermic
Calcium & Water
Reaction #4 - Endothermic
Baking Soda & Vinegar
Time Temperature (⁰C)
(sec.)
Time Temperature (⁰C)
(min.)
Time Temperature (⁰C)
(min.)
Time Temperature (⁰C)
(sec.)Slide4
Graph ResultsOn one piece of graph
paper.Have a key to distinguish which line represents which reaction.