Energy Content in Fuel

The energy content of a fuel is typically measured in joules or calories per unit of mass or volume. Different fuels have different energy contents due to variations in their chemical composition. Here are some common fuels and their approximate energy contents per unit mass:

1. Gasoline: Gasoline has an energy content of around 45-46 megajoules per kilogram (MJ/kg) or approximately 120 megajoules per gallon (MJ/gal).
2. Diesel: Diesel fuel has a slightly higher energy content than gasoline, typically around 45-48 MJ/kg.
3. Natural Gas (Methane): Natural gas has an energy content of about 50-55 megajoules per kilogram (MJ/kg) or around 39 megajoules per cubic meter (MJ/m³).
4. Propane: Propane has an energy content of approximately 50 megajoules per kilogram (MJ/kg) or about 46 megajoules per liter (MJ/L).
5. Coal: The energy content of coal can vary widely depending on the type of coal and its moisture content, but it generally ranges from about 20 to 30 megajoules per kilogram (MJ/kg).
6. Wood: The energy content of wood also varies depending on factors like species and moisture content, but it typically ranges from about 15 to 20 megajoules per kilogram (MJ/kg).

These values are approximate and can vary depending on factors such as the specific composition of the fuel and the conditions under which it is burned.