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Define ignition temperature of a fuel....

Define ignition temperature of a fuel.

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Ignition temperature of fuel can be defined as the minimum temperature to which a fuel must be heated so that it may catch fire and start burning.
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'The ignition temperature of a fuel is 80^(@)C . What does this mean ?

(a) What is a fuel ? Give five examples of fuels. (b) What are the characteristics of an ideal fuel (or good fuel) ? (c ) The calorific value and ignition temperature of fuel A are 55 kJ/g and 80^(@)C , respectively. These values for fuel B are 80 kJ/g and 10^(@)C , respectively. On burning, the fuel A produces CO_(2) and H_(2)O while the fuel B produces CO_(2), CO and SO_(2) . Give three points of relative advantages and disadvantages of these two fuels.

Knowledge Check

  • Ignition temperature is

    A
    Lowest temperature at catch fire
    B
    Higher temperature at catch fire
    C
    Any temperature
    D
    None of these

  • Ignition temperature is

    A
    Lowest temperature at catch fire
    B
    Higher temperature at catch fire
    C
    Any temperature
    D
    None of these

  • The ignition temperature of a substance is very low in _____ combustion.

    A
    Incomplete
    B
    Complete
    C
    Rapid
    D
    Spontaneous

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    The calorific value and ignition temperature of fuel A are 55 kJ/g and 20^(@)C respectively. These values for another fuel B are 50 kJ/g and 80^(@)C respectively. Which of the two will be more ideal fuel if, on burning, the fuel A produces CO_(2),SO_(2) and SO_(3) as by-products while the fuel B produces CO_(2) and H_(2)O ? Give two reasons in support of your answer.

    Calorific value and ignition temperature of fuel X are 75 kJ/g and 20^(@)C respectively. These values for fuel Y are 50 kJ/g and 75^(@)C respectively. On burning, the fuel Y produces only CO_(2) while fuel X produces CO_(2) and CO. Which of the two is a better fuel ? Give two reasons to support your answer.

    Define critical temperature.

    Define dew point temperature.

    Assertion : The ignition temperature of kerosene oil is lower than that of wood. Reason: A combustible substance cannot catch fire as long as its temperature is lower than its ignition temperature.

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