Chemical Cells & Fuel Cells (AQA GCSE Chemistry): Flashcards
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13 cards from this deck
What energy conversion occurs in electrochemical cells?
What energy conversion occurs in electrochemical cells?
Chemical energy to electrical energy
How do electrochemical cells generate voltage?
How do electrochemical cells generate voltage?
Chemical reactions at the electrodes
Two main components of electrochemical cells
Two main components of electrochemical cells
Electrodes and electrolyte
How many electrodes in an electrochemical cell?
How many electrodes in an electrochemical cell?
Two (one negative, one positive)
Metals used for electrodes (examples)
Metals used for electrodes (examples)
Copper, zinc, platinum
What is an electrolyte?
What is an electrolyte?
A solution containing ions
What does the electrolyte do?
What does the electrolyte do?
Facilitates ion flow between electrodes
Typical voltage of single cell
Typical voltage of single cell
2-3 volts
How to get higher voltage from cells?
How to get higher voltage from cells?
Connect cells in series
Total voltage of cells in series equals?
Total voltage of cells in series equals?
Sum of individual cell voltages
How does metal reactivity difference affect voltage?
How does metal reactivity difference affect voltage?
Greater difference = higher voltage
Reaction type in non-rechargeable batteries
Reaction type in non-rechargeable batteries
Irreversible
Reaction type in rechargeable batteries
Reaction type in rechargeable batteries
Reversible (via external voltage)