Write caloric value of different fuels.
Fuel
calozzines, value
Cow dung cake
,
Coal
petrol
Diesel
CNG
Answers
Explanation:
Objective
This topic gives an overview of;
Fuel
Types of Fuels
Fuel Efficiency
Burning of Fuels
What is a Fuel?
The sources of heat energy for domestic and industrial purposes are mainly wood, charcoal, petrol, kerosene, etc. These substances are called fuels. A good fuel is one which is readily available. It is cheap. It burns easily in air at a moderate rate. It produces a large amount of heat. It does not leave behind any undersirable substances.
There is probably no fuel that could be considered as an ideal fuel. We should look for a fuel which fulfils most of the requirements for a particular use. Fuels differ in their cost. Some fuels are cheaper than others.
Types of Fuels
Fuels can be divided into three main categories
Solid fuels
Liquid fuels
Gaseous fuels
Solid fuels: Solid fuels left some ash or residue after combustion. The solid fuels are given below.
S. No. Solid Fuels
1 Coal
2 Cow dung cake
3 Wood
Liquid fuels: Most of the liquid fuels in use are the hydrocarbons which exist in the liquid phase at room temperature. The liquid fuels are given below.
S. No. Liquid Fuels
1 Petrol
2 Kerosene
3 Diesel
4 LPG
Gaseous fuels: Some of the gaseous fuels exist naturally at room temperature and some are made by the treatment of coal. The gaseous fuels are given below.
S. No. Gaseous Fuels
1 Biogas
2 CNG
3 Hydrogen
Fuel Efficiency
Suppose you were asked to boil a given quantity of water using cow dung, coal and LPG as fuel. 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 kilojoule per kg (kJ/kg). Calorific values of some fuels are given in Table.
Calorific Values 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
Answer:
Answer given below.
Explanation:
Petrol 11,110 kcal per kg
coal 8,000 kcal/kg
CNG 12500 kcal/kg
Diesel 10000 kcal/kg