C5-Energy changes Flashcards
What happens to energy into chemical reaction
The amount of energy in the universe at the end of direction is the same as before – that over amount of energy doesn’t change
What is an exothermic reaction
Where heat is given out
– this is shown by a rise in temperature
– e.g. combustion
What are real life examples of exothermic reaction
Hand warmers
Self heating cans
What is an endothermic reaction
The heat is taken in
-This is shown by a fall in temperature
What are real life examples of endothermic reaction is
Sports injury packs
In an exothermic reaction is the energy of the reactants or products larger
But the energy of the reactants is higher than the products because energy is released
What is the activation energy
The initial energy that is needed to start the reaction – this is the initial rise
In an endothermic reaction is the Energy of the reactants or products larger
The The products have a high energy as energy is put into the reaction
is bond breaking Endothermic or exothermic
Endothermic
It’s bond forming exothermic or endothermic
Exothermic
