DoITPoMS

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Questions

Quick questions

You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!

  1. Which of the following statements is not true?

    a A battery is an electrochemical cell.
    b If an electrode acted as the anode during discharge it will act as a cathode during charging.
    c During the operation of a battery, one material is oxidised and another is reduced.
    d The voltage needed to charge a battery is less than the voltage produced when it is discharged.

  2. What can thermodynamics and kinetics tell us about the reactions that occur in a battery?

    a They both tell us if it is possible for the reaction to occur or not.
    b Thermodynamics tells us if it is possible for a reaction to occur or not, kinetics tells us what the rate of this reaction will be.
    c They both tell us what the rate of the reaction will be.
    d Kinetics tells us if it is possible for a reaction to occur or not, thermodynamics tells us what the rate of this reaction will be.

  3. Which of the following pieces of information cannot be gained from a Tafel plot?

    a The maximum voltage that can be expected whilst drawing or supplying a particular current density.
    b The minimum voltage that can be expected whilst drawing or supplying a particular current density.
    c The anodic and cathodic potentials in a battery for a given current density.
    d The diffusion limited current density.

  4. Are the following primary or rechargeable batteries?

    (a) Zinc/Carbon battery

    (b) Lithium ion battery

    (c) Lead/acid battery

    (d) Alkaline/Managanese dioxide battery

    (e) Nickel/Cadmium battery

    (f) Zinc/Air battery

    (g) Zinc/Silver Oxide battery

    (h) Silver/Hydrogen battery

    (i) Potato battery

  5. Using the electrochemical series, what would the theoretical potential difference be in the following cells, if only thermodynamics was considered?

    (a) Zinc and copper

    (b) Nickel and mercury

    (c) Zinc and silver

    (d) Lithium and silver

  6. What batteries might you use to power the following applications?

    (a) A mobile phone

    (b) A hand-held computer console

    (b) A wristwatch

    (d) To start a car


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