Value of normal atmospheric pressure at sea level at 0°C is______?
Correct answer: D. All of these
- A. 1 atm
- B. 760 Torr
- C. 76cm of Hg
- D. All of these
Explanation
Standard atmospheric pressure at sea level and 0 °C is 1 atm, which is equivalent to 760 torr and a 76 cm column of mercury. Since all three options represent the same pressure, option d is correct; choosing only 1 atm or 760 torr misses the equivalent units.
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About Standard Temperature and Pressure
Standard temperature and pressure provide reference conditions for gas calculations: 0°C or 273 K and, in the usual school convention, 1 atm pressure. Questions use these conditions to relate pressure, volume, temperature and amount of gas, including the molar volume of an ideal gas, about 22.4 dm³.
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