In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kj. Calculate the
calorific value of the fuel.
Answer:
The calorific value of fuel is the amount of heat produced by the complete combustion of 1 kg of fuel.
Now.
Heat produced by 4.5 kg of fuel = 180000 kj
rr . 180000
1 kg of fuel =180000/4.5x 1 kJ/kg
Therefore, heat produced by= 40.000 kj/kg
Hence, the calorific value of the fuel is 40.000 kj/kg.
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the
wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get
heated in a shorter time?
Give reasons.
(a) Water is not used to control fires involving electrical equipment.
(b) LPG is a better domestic fuel than wood.
(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.