Bond energies (Edexcel GCSE Chemistry Combined Science): Flashcards
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12 cards from this deck
What happens to bonds in chemical reactions
What happens to bonds in chemical reactions
Bonds broken & new bonds formed
Reaction type that absorbs energy
Reaction type that absorbs energy
Endothermic
Reaction type that releases energy
Reaction type that releases energy
Exothermic
Energy balance in endothermic reactions
Energy balance in endothermic reactions
Energy to break bonds > energy released
Overall energy change sign: endothermic
Overall energy change sign: endothermic
Positive
Overall energy change sign: exothermic
Overall energy change sign: exothermic
Negative
Surroundings effect: endothermic reaction
Surroundings effect: endothermic reaction
Feel cooler
Surroundings effect: exothermic reaction
Surroundings effect: exothermic reaction
Feel warmer
Energy sign when breaking bonds
Energy sign when breaking bonds
Positive
Energy sign when forming bonds
Energy sign when forming bonds
Negative
Reaction type if energy change is positive
Reaction type if energy change is positive
Endothermic
Reaction type if energy change is negative
Reaction type if energy change is negative
Exothermic