What is the weight of water in terms of lbs per gallon?

The weight of water is commonly recognized as 8.34 pounds per gallon at a specific temperature, typically around 62 degrees Fahrenheit, which is considered the standard reference temperature for most water density measurements. Water's density can change with temperature and impurities, but the approximate weight of 8.34 lbs/gal is widely used for various calculations in engineering and water resource management.

While options suggesting 8.00 lbs/gal and 9.00 lbs/gal may seem plausible, they do not align with the accepted standard for the weight of water. The value of 8.00 lbs/gal is often seen in simplified contexts but does not reflect the standard density value, while 9.00 lbs/gal is too high and not representative of pure water. The option of 9.34 lbs/gal exceeds the typical weight of fresh water under normal conditions and would typically suggest a higher density substance, such as a liquid with additives or impurities.

Thus, the weight of water at the standard condition is accurately expressed as 8.34 lbs per gallon, which is effectively used in water quantity calculations for a variety of applications, including hydrology, environmental science, and civil engineering.