If you have 1.5 lbs of air, how many cubic feet of standard air does it comprise?

To determine how many cubic feet are comprised in 1.5 lbs of standard air, you can use the relationship between the weight of air and its volume at standard conditions, specifically at a temperature of 60°F and a pressure of 14.7 psi (standard atmospheric conditions).

At standard conditions, the density of air is approximately 0.075 lbs per cubic foot. To find the volume of air based on weight, you can use the formula:

Volume (cubic feet) = Weight (lbs) / Density (lbs per cubic foot)

In this case, you'll substitute the values into the formula:

Volume = 1.5 lbs / 0.075 lbs/cubic foot = 20 cubic feet.

This calculation shows that 1.5 lbs of air occupies 20 cubic feet under standard conditions, which aligns with the correct answer. Understanding the relationship between weight and volume of air is essential in various applications in HVAC and sheet metal work, making this calculation an important one for those in the field.