Which of the following is equivalent to 1 atmosphere (atm) of pressure?

• A. 1.00 psi
• B. 101.3 kPa
• C. 100 Pa
• D. 760 mm Hg

Answer: (B)

Verified step by step guidance

1. Understand that 1 atmosphere (atm) is a unit of pressure commonly used in chemistry and physics to describe standard atmospheric pressure at sea level.
2. Recall the standard conversion values for pressure units: 1 atm is defined as exactly 101.325 kilopascals (kPa), which is a measure of pressure in the metric system.
3. Recognize that 1 atm is also equivalent to 760 millimeters of mercury (mm Hg), which is a traditional unit of pressure based on the height of a mercury column.
4. Note that 1 atm is approximately equal to 14.7 pounds per square inch (psi), so 1.00 psi is much less than 1 atm and therefore not equivalent.
5. Understand that 100 pascals (Pa) is a very small pressure compared to 1 atm, since 1 atm equals 101,325 Pa, so 100 Pa is not equivalent to 1 atm.