Energy Transfer in Reactions - Exothermic and Endothermic

Description

GCSE Chemisty (C3 - Energy Transfer) Flashcards on Energy Transfer in Reactions - Exothermic and Endothermic, created by Little Dragon on 19/04/2014.
Little Dragon
Flashcards by Little Dragon, updated more than 1 year ago
Little Dragon
Created by Little Dragon over 10 years ago
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Resource summary

Question Answer
Exothermic Reactions give out heat energy to the surroundings RISE IN TEMPERATURE Example - Burning Fuels
Endothermic Reaction takes in energy from surroundings FALL IN TEMPERATURE Example - Thermal Decomposition
Adding an acid to an alkali is ... Exothermic (Gives out heat energy)
Dissolving ammonium nitrate in water is ... Endothermic (takes in heat energy)
Energy MUST be supplied to break bonds Bond breaking is Endothermic (Takes in energy)
Energy is released when new bonds are formed Bond Formation is Exothermic (Gives out energy)
Bond Breaking - Endothermic
Bond Forming - Exothermic
Exothermic Reaction Energy released in bond formation > energy used in breaking old bonds
Endothermic Reaction The energy required to break old bonds > the energy released when new bonds are formed
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