What is the SI unit of pressure?
Correct answer: A. Nm-2
- A. Nm-2
- B. Nm2
- C. mm of Hg
- D. atm
Explanation
Pressure:Pressure is defined as force per unit area. P = F/ A---> P = N/m^2---> P = Nm^-2 Hence, A is the correct option.
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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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