A typical petrol is a mixture of various chemicals such as paraffin, olefins and naphthalene. Petrol has a basic chemical formula since it is a mixture of various chemicals and is also blended as per its need. So, it’s general chemical formula is CnH2n+2.
What is a meant by fuel value in chemistry?
Fuel values are defined as the amount of energy generated by complete combustion of a particular mass of the fuel (usually one gram). It takes more energy to move larger amounts of mass; thus the higher the energy density (fuel value) the less energy is used transporting the fuel.
How do you calculate fuel efficiency in chemistry?
How do you calculate the energy content of fuels?
where H = heat energy absorbed (in J), Δt = change in temperature (in °C), m = mass (in g), and Cp = specific heat capacity (4.18 J/g°C for water). Dividing the resulting energy value by grams of food burned gives the energy content (in J/g).
What is fuel give example?
(a) Any substance which upon combustion produces a usable amount of energy is known as fuel. For example wood, coal, biogas, LPG, petrol, diesel etc.
What are the 3 types of fuel?
- Solid Fuels.
- Liquid Fuels.
- Gaseous Fuels.
What is the fuel value of ethane?
Ethane has a boiling point of −88 °C (−126 °F). The fuel value of ethane is 1730 Btu per cubic ft.
What is heating value of fuel?
The heat value of a fuel is the amount of heat released during its combustion. Also referred to as energy or calorific value, heat value is a measure of a fuel’s energy density, and is expressed in energy (joules) per specified amount (e.g. kilograms). Heat value. Hydrogen (H2) 120-142 MJ/kg.
Which compound has the highest fuel value Why?
Hydrogen has the highest calorific value of (141,790 KJ/kg) thus have highest fuel value.
How is fuel value measured?
To measure calorific value, we use a calorimeter. The fuel is first combusted with Oxygen, under pressure, in a sealed “bomb”. Then, the heat of the subsequent reaction is measured from the temperature rise of a surrounding water bath.
How are fuels measured?
Energy Output of Fuels unit of measurement for energy is the joule, J. The amount of energy that can be obtained by the combustion of a fuel is its energy output. The energy output of a fuel is measured in joules per amount of fuel combusted.
What is the fuel value of natural gas?
Natural gas: 42-46 MJ/m3.
Why do fuels have different energy values?
The amount of energy released is dependent on the oxidation state of the carbons in the hydrocarbon which is related to the hydrogen/carbon ratio. The more hydrogen per carbon, the lower the oxidation state and the more energy that will be released during the oxidation reaction.
What is energy formula?
The energy stored in an object due to its position and height is known as potential energy and is given by the formula: P.E. = mgh. Unit. The SI unit of energy is Joules (J).
What is the chemical name of fuel?
Many fuel gases are composed of hydrocarbons (such as methane or propane), hydrogen, carbon monoxide, or mixtures thereof.
What fuel means?
Definition of fuel (Entry 1 of 2) 1a : a material used to produce heat or power by burning. b : nutritive material. c : a material from which atomic energy can be liberated especially in a reactor.
What are called fuels?
Fuel meaning: Meaning of fuel is a substance that is burned to provide nuclear energy, heat or power. Materials like coal, wood, oil, or gas can provide heat when burned. Methanol, Gasoline, Diesel, Propane, Natural gas, Hydrogen are types of fuel.
Is fuel a energy?
Fuels are dense repositories of energy that are consumed to provide energy services such as heating, transportation and electrical generation. Even though most fuels ultimately get their energy from the sun (see energy conservation) they are usually considered to be a primary energy source.
What is fuel made of?
Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth’s crust and contain carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas are examples of fossil fuels.
What are the 4 fuel types?
- Diesel Fuel.
How do you calculate calorific value of ethane?
Calorific value of ethane, in kJ/g if for the reaction : 2C2H6 + 7O2 → 4CO2 + 6H2O; Δ H = – 745.6 kcal.
Why is ethane not used as a fuel?
The lack of awareness is the major barrier for using ethane as a transportation fuel. Due to this lack of awareness, very few assessments or tests have been conducted on ethane for transportation purposes.
How do you calculate the heat value of liquid fuel?
Goutel suggested the following formula from calculating the higher calorific value when the percentage proximate analysis of fuel is known. The formula is, cal. value = 343.3 x fixed carbon % + α x % volatile matter kJ/kg.
How do you calculate the heat value of a gas mixture?
Heating value of Methane We compute the lower heating value (LHV) as the difference in enthalpy (per kg mixture) between reactants and products at constant temperature and pressure, divided by the mass fraction of fuel in the reactants. The LHV is calculated assuming that water remains in the gas phase.
What is the heat value for LPG?
LPG calorific value is 93.2MJ/m3, which is a higher energy content than the calorific value of natural gas (heating value of natural gas), which is 38.7MJ/m3.