alleryStart learning →One atmosphere of pressure is equal to how many pascals?
A76,000 Pa
B100,000 Pa
C101,325 Pa
D1,013,250 Pa
Answer & Solution
Correct answer: C. 101,325 Pa
1. Standard atmospheric pressure at sea level is defined as 1 atm.
2. Expressed in SI units, 1 atm is 101,325 Pa.
3. The value 100,000 Pa is exactly 1 bar, which is close to 1 atm but deliberately a round number, so it is the trap here.
4. The same pressure also supports a mercury column about 760 mm high.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.1 Gas Pressure_
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