-Entropy is a measure of randomness.
-Exothermic rnx are mostly spontaneous and entropy will always increase
-Endothermic rnx are not spontaneous and entropy will decrease in the system, but still increases the entropy in the universe
-Entropy is based on human experiences. i.e. a bag of marbles spilled on the floor will roll in different, random directions
-All reactions contribute to the overall increase of entropy in the universe.
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