energy changes Flashcards
1
Q
what is the balanced equation for hydrogen fuel cell
A
2H_2+O_2->2H_2O
2
Q
factors that affect the voltage of a cell
A
The metals used for the two electrodes. The greater the difference in reactivity of the two metals, the greater the voltage will be.
The type and concentration of the electrolyte used.
The conditions, such as temperature.
3
Q
difference between electrolysis and cells
A
- electrolysis uses electricity to produce a chemical reaction
- cells use a chemical reaction to produce electricity
