LI-5 energy changes in reactions Flashcards
1
Q
what is kenetic energy
A
anything that moves
-sound,light,heat and mechanical energy
2
Q
endothermic
A
absorbs energy from surroundings and becomes cold because it absorbs heat and brakes bonds
3
Q
exothermic
A
releases energy into surrounding and feels hot and makes bonds
4
Q
an example of an endothermic reaction
A
photosynthesis is an endothermic reaction because the energy from the sunlight is absorbed to power the reaction
5
Q
an example of an exothermic reaction
A
fire is an example of an exothermic reaction because it releases energy which is heat
6
Q
what state changes is an exothermic reaction
A
gas-liquid-solid
7
Q
what state changes is an endothermic reaction
A
solid-liquid-gas
8
Q
what is activation energy ?
A
the energy required for chemical reaction to occur
