How much water is produced from burning 100,000 BTUs of energy?

When fuel is burned for energy, one of the byproducts of the combustion process is water vapor. The amount of water produced when burning fuel can vary depending on the type of fuel being used and its hydrogen content, but a common estimate in energy calculations is that approximately 1 gallon of water is produced for every 100,000 BTUs of energy burned.

In this case, when the burn process liberates energy in the form of BTUs, the water produced is primarily due to the hydrogen in the fuel combining with oxygen from the air to create water vapor. Therefore, the correct answer indicating the production of one gallon of water for burning 100,000 BTUs aligns with typical combustion outputs for common fuels used in residential and commercial energy production. This understanding is vital for energy auditing and efficiency measures within building performance considerations.