Amount of heat produced on complete combustion of 1 kg of fuel is called calorific value

(When we burn 1 kg of fuel,amount of heat produced)

Calorific Value heat.jpg

How is Calorific Value Measured?

It is measured in kilojoules/kg

Example

Calorific Value of Petrol is 45000 KJ/Kg

It means if 1 Kg of Petrol is completely combusted,it will produce 45000 Kilojoules of heat energy

 

Calorific Value of Different Fuels

 

Fuel

Calorific Value (kJ/kg)

Cow dung cake

6000-8000

Wood

17000-22000

Coal

25000-33000

Petrol

45000

Kerosene

45000

Diesel

45000

Methane

50000

CNG

50000

LPG

55000

Biogas

35000-40000

Hydrogen

150000

 

How to calculate Calorific value?

calorific value.jpg

Questions

NCERT Question 7 - Name the unit in which the calorific value of a fuel is expressed
View Answer

 

  1. Class 8
  2. Chapter 6 Class 8 - Combustion And Flame

Transcript

Calorific value = Heat Produced on burning(complete combustion) of 1 Kg of fuel Calorific value = Heat Kg Heat It is measured in Kilo Joules Amount of fuel consumed in kg

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.