CHEMISTRY energy changes

?
Exothermic change: heat exits, temperature of surroundings increases. ▲H is negative
BONDS ARE BROKEN
1 of 5
Endothermic change: heat is absorbed, temperature of surroundings drops, ▲H is positive
BONDS ARE FORMED
2 of 5
Breaking bonds always requires energy
Forming bonds always releases energy
3 of 5
At equilibrium, the concentrations do not change
Equilibria can only exist in closed systems
4 of 5
Equilibria are dynamic ie. they do not stop
At equilibrium therate of the formed reaction = rate of reverse reaction
5 of 5

Other cards in this set

Card 2

Front

BONDS ARE FORMED

Back

Endothermic change: heat is absorbed, temperature of surroundings drops, ▲H is positive

Card 3

Front

Forming bonds always releases energy

Back

Preview of the back of card 3

Card 4

Front

Equilibria can only exist in closed systems

Back

Preview of the back of card 4

Card 5

Front

At equilibrium therate of the formed reaction = rate of reverse reaction

Back

Preview of the back of card 5

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Energy of reactions/Exothermic and endothermic reactions resources »