Flashcards in Topic #5: Energy Changes Deck (7):
What are endo and exothermic reactions?
Endo- takes in heat, positive enthalpy change
Exo- gives out heat, negative enthalpy change
Reaction profile features
Activation energy must be on
Formula for energy change?
Bonds broken - bonds formed = energy change
In endothermic, more energy is taken in to break bonds than is given out making them, and vice versa
What is a cell and a battery?
Cell- 2 metals in contact with electrolyte
Battery- 2 or more cells
Non-rechargeable batteries stop when?
When the reactants have all been used up
What are fuel cells?
Powered by oxidation of hydrogen to make water, only waste product is water