The Rock And The Hill And The Hill And The Rock...
a: Endothermic reaction ~
b: pushing a rock up a hill
What: "An endothermic reaction is like pushing a rock up a hill.
An exothermic reaction is like rolling a rock down a hill. A match is like giving a rock a shove. Either type of reation may require a start from a match"
Useful?
Writer: lurflurf
LCC:
Where:
Date: May 7 2013 11:10 AM
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