Heat of combustion is a measure of how much energy is released when a substance is burned.
The term heat of combustion refers to the amount of energy released when a substance is burned. The concept applies to many types of materials, from fossil fuels like coal and petroleum to biological matter like wood and plant matter. Heat of combustion has several different definitions depending on the type of material being discussed, but the most common measure for all substances is called the British Thermal Unit (BTU). This measurement can be used to determine how much energy a substance releases when it burns.
What Is Heat?
Before discussing heat of combustion, it’s important to understand what heat itself means. Heat, or thermal energy, can be defined as the average kinetic energy per molecule in a given substance. In other words, it’s the amount of movement that molecules have in an object or material. This movement causes objects to expand or contract depending on whether they are absorbing or releasing thermal energy.
How Does It Relate To Combustion?
Combustion occurs when oxygen interacts with fuel molecules at high temperatures (usually between 600°C and 1,000°C). The chemical reaction that occurs during this process releases thermal energy in the form of light and heat.
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NPR stands for National Public Radio.
