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Design an electrochemical cell that produces an optimal energy output.-…
Design an electrochemical cell that produces an optimal energy output.- change to question
Elements of an electrochemical cell
Salt Bridge
Anode
Cathode
Solutions
Wire
Salt Bridge
Material its made out of
Type of salt its made out of
Length and thickness of salt Bridge
Amount of salt on salt bridge?
trying to make a graph
concentration of salt bridge, surface area (amount touching electrodes) (number of bridges, the amount of things)
Wire
length of wire
conductivity of wire
insulation
amount/ thickness of wire
either its limited by the school or it doesn't work
(you can still talk about flow cells etc in your prac.
Anode, Cathode and Solutions
Strength of the metal in the cathode solution
Difference in electronegativity between anode and cathode solution
Conductivity of the electrodes
Surface area of the electrodes
Amount of solution and anode
type of solution (sulphate solution etc)
Metal Reactivity:
What should be impacted, pros and cons
The surface area of the anode impact the number of reactions that can occur between the electrode and the anode. This leads to more electrons being released and a higher energy output.
This change would not be measured if the energy output is measured in volts
How will this be measured? / is it only the anode. The end of the anode is the end of the cell,
galvanic cells and fuel cell differences
why not a fuel cell
Unchangeable Variables? Controlled Variables
Factors that can't be controlled: - temperature - quality of the metal volume of metal, sa, thickness -
Limiting factors
Dependant Variable (energy)
How is this measured?
Voltage
Current
Light bulb
Aspects, advantages and disadvantages:
Electrical Energy
Optimisation Definition
How long does the battery produce electricity?
How strong is the electricity being produced?
How consistent is the electricity output overtime?
What is the cell being optimised for?
How safe is the battery?
Is there any lost energy before the reaction occurs? -
What energy is lost, how is it lost
This energy however needs to be stored in batteries which then need to be able to be efficiently discharged when required.
Cost
Other factors that can change: (enthalpy is negative so heating?
pressure is not an impacting factor as no gasses are used ph
temperature - negative enthalpy, exothermic, reaction going backwards if heat is added, going forwards if heat is taken away what about reaction rate it looks like that's different.