TOPIC 5 Flashcards
What type of chemical does a chemical store
They store different chemicals store different amounts
What does it mean if the product of a reaction store more energy than the original reactant
Then they must of taken in the difference in energy between the products and reactant from the surrounding during the reaction
What if the products store less
Then the exec was energy was transferred to the surrounding d during the reaction
Why doesn’t the overall energy change
This is because energy is conserved in reactions- it can not be created of destroyed only moved around.
What is exothermic reaction
It is when her is given out
It transfers energy to the surroundings usually by heating.
How is exothermic shown
By a rise in temperature
What is the best example of an exothermic reaction
It is burning fuels- also called Combustion
What is neutralisation an example of
Exothermic reaction
Many oxidation are what
They are exothermic reason
Give an example of exothermic reaction in everyday uses
Some hand warmers
Self heating cans
Exothermic reaction
What is endothermic reaction
When energy is taken in
An exothermic reaction is one which takes in energy from from the surroundings
How is temperature shown in
A fall in temperature
What is endothermic reaction include
Thermal decomposition
Give examples of endothermic reaction in everyday uses
Sports injury packs
Instantly cooler
What are reaction profiles
Diagrams that show the relative energies of the reactant and products in a a reaction and how the energy changes over time
