CC15
- Created by: Lottie Deutsch
- Created on: 03-12-17 12:09
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- CC15
- exothermic and endothermic reactions
- exothermic reactions are when heat is given out and the temp. goes up
- energy transferred from stores of energy in bonds to surroundings
- endothermic is heat is taken in and temp goes down
- energy transferred from surroundings to stores of energy in bonds
- these reactions can be shown by reaction profiles like on pg. 258
- the higher the line the greater the energy stored
- energy transferred from stores of energy in bonds to surroundings
- these reactions can be shown by reaction profiles like on pg. 258
- energy transferred from surroundings to stores of energy in bonds
- precipitation reactions can be endothermic or exothermic
- but displacement reactions and neutralization reactions are always exo
- because energy is stored at the beginning than at the end
- salt dissolving in water can be exo or endo
- but displacement reactions and neutralization reactions are always exo
- exothermic reactions are when heat is given out and the temp. goes up
- energy changes in reactions
- activation energy in precipitation and neutralization reactions is lower than in combustion reaction
- refer to pg. 260 for reaction profiles which include activation energies
- endo - energy transferred to reactant to break bonds
- exo - energy transferred to surroundings as bonds form
- exo making bonds endo breaking bonds
- exo - energy transferred to surroundings as bonds form
- refer to pg. 261 for calculations
- if answer is a negative sign the reaction is exo if positive reaction is endo
- activation energy in precipitation and neutralization reactions is lower than in combustion reaction
- exothermic and endothermic reactions
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