Energy Sources and Biofuels

Flashcards focusing on key concepts related to energy sources, fossil fuels, biofuels, and their conversions.

What are the two main sources of energy mentioned in the notes?

Fossil fuels and biofuels.

What is the process used to separate different components of crude oil?

Fractional distillation.

What does biofuel primarily derive from?

Plant materials such as maize, wheat, barley, sugarcane, and vegetable waste.

What is one key benefit of biofuels in terms of carbon emissions?

Biofuels are considered carbon neutral as they do not contribute to an increase in atmospheric CO2.

What is the chemical reaction that biodiesel production involves?

A chemical reaction between vegetable oil and an alcohol such as methanol.

What type of energy conversion occurs in a fossil fuel power plant?

Chemical energy from fuel is converted to thermal energy, then to kinetic energy, and finally to electrical energy.

Name a disadvantage of fossil fuel usage.

It contributes to air pollution and is non-renewable.

What is the main emission product from the combustion of fossil fuels?

Carbon dioxide (CO2).

What is the significance of energy density in fuels?

Energy density measures the amount of energy released per unit volume or mass of fuel.

How does biogas contribute to energy production?

Biogas is produced from decaying organic matter, generating methane and carbon dioxide which can be used as fuel.