Which among the following has the highest calorific value?
Wood
Hydrogen
Methane
Coal
A
Methane
B
Wood
C
Coal
D
Hydrogen
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Solution
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The amount of heat energy produced on
complete combustion of 1 kg of a fuel is
called its calorific value. The calorific
value of a fuel is expressed in a unit called kilojouleperkg(kJ/kg).
Hydrogen has the highest calorific value of about 150000kJ/kg whereas the calorific value of wood, coal, and petrol is less than 50000kJ/kg
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