Q18 of 269 Page 122

What are the characteristics of an ideal fuel (or good fuel)?

The characteristics of an ideal fuel are:

It must have high calorific value.


It must burn without releasing any smoke or toxic gases.


It need to have proper ignition temperature.


It should be inexpensive and easily accessible.


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Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable sources of energy whereas wood is a renewable sources of energy?

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What is a fuel? Give five examples of fuels.

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The calorific value and ignition temperature of fuel A are 55 kJ/g and 80oC, respectively. These values for fuel B are 80 kJ/g and 10°C, respectively. On burning, the fuel A produces CO2 and H2O while the fuel B produces CO2, CO and SO2. Give three points of relative advantages and disadvantages of these two fuels.

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An example of a renewable sources of energy is :