Chemistry - Energy Changes Flashcards
(6 cards)
1
Q
what is an exothermic reaction
A
when energy exits into the surroundings
2
Q
what’s an endothermic reaction
A
when energy enters the reaction
3
Q
what is activation energy
A
minimum amount of energy needed for a chemical reaction to take place
4
Q
what happens in an exothermic reaction
A
energy is transferred from chemical energy to thermal store
products are lower than reactants
overall energy change is negative
5
Q
what happens in an endothermic reaction
A
energy transferred from the thermal store to the chemical energy store
products are higher than reactants
overall energy changes is positive
6
Q
A
