by burning 2 kg of petrol how much heat energy will we get?
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Mass of fuel (m)=2kg
Calorific value of the fuel (S)= 22000kJ kg −1
Initial temperature of water = 34 C ( TEMP. 1)
Final temperature of water = 100C ( TEMP.2 )
∴ Rise in temperature = ( T1 - T2)
=(100−34)C=66C
Specific heat capacity of water (S)=4200Jkg -1
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