In an experiment, on burning 3.5 Kg of fuel, 70,000 kJ of energy waspr

1.	In an experiment, on burning 3.5 Kg of fuel, 70,000 kJ of energy wasproduced. Determine its calorific value.
Answer» Given:- →Mass or AMOUNT of fuel BURNT =3.5kg →Amount of energy produced = 70000kJ To find:- →Calorific value of the fuel Solution:- We know that:- Calorific value of a fuel :- Amount of energy produced / Amount of fuel burnt = 70000/3.5 = 20000 kJ/kg Thus, calorific value of the fuel is 20000 kJ/kg. Some Extra Information:- Calorific value : It REFERS to the HEAT produced by unit volume of a substance by complete combustion. The efficiency of a fuel or food mainly depends on it's calorific value. If calorific value of a fuel is high, it's efficiency will be also high. S.I. unit : The S.I. unit of calorific value is kJ/kg (Kilojoules-per Kilogram) The calorific values (approximate) of some common fuels are :- • LPG - 55000 kJ/kg • Petrol - 45000 kJ/kg • Diesel - 45000 kJ/kg • Coal - 33000 kJ/kg • Biogas - 40000 kJ/kg • Wood - 22000 kJ/kg

In an experiment, on burning 3.5 Kg of fuel, 70,000 kJ of energy wasproduced. Determine its calorific value.

Answer»

→Mass or AMOUNT of fuel BURNT =3.5kg

→Amount of energy produced = 70000kJ

→Calorific value of the fuel

We know that:-

Calorific value of a fuel :-

Amount of energy produced / Amount

of fuel burnt

= 70000/3.5

= 20000 kJ/kg

Thus, calorific value of the fuel is 20000 kJ/kg.

Calorific value : It REFERS to the HEAT produced by unit volume of a substance by complete combustion.

The efficiency of a fuel or food mainly depends on it's calorific value. If calorific value of a fuel is high, it's efficiency will be also high.

S.I. unit : The S.I. unit of calorific value is kJ/kg (Kilojoules-per Kilogram)

The calorific values (approximate) of some common fuels are :-

• LPG - 55000 kJ/kg

• Petrol - 45000 kJ/kg

• Diesel - 45000 kJ/kg

• Coal - 33000 kJ/kg

• Biogas - 40000 kJ/kg

• Wood - 22000 kJ/kg