How many BTU's are in one gallon of LP?

How many BTU's are in one gallon of LP?

• A. 91502
• B. 90000
• C. 82500
• D. 100000

Answer: (A)

Propane’s energy content is often given as BTU per pound when burned, and the liquid form has a specific weight per gallon. A gallon of liquid propane weighs about 4.23 to 4.24 pounds. If you multiply that by the energy content of propane in the gas phase, roughly 21,500 BTU per pound, you get about 91,000 BTU per gallon. The standard published value is 91,502 BTU per gallon, which is the figure closest to real energy content. So, one gallon of LP contains about 91,502 BTU, which is why that value is the best match. The other numbers don’t align with the known energy density of propane per gallon.

Propane’s energy content is often given as BTU per pound when burned, and the liquid form has a specific weight per gallon. A gallon of liquid propane weighs about 4.23 to 4.24 pounds. If you multiply that by the energy content of propane in the gas phase, roughly 21,500 BTU per pound, you get about 91,000 BTU per gallon. The standard published value is 91,502 BTU per gallon, which is the figure closest to real energy content. So, one gallon of LP contains about 91,502 BTU, which is why that value is the best match. The other numbers don’t align with the known energy density of propane per gallon.