Characteristics of gases



It is the force acting on an object per unit area. P = F / A
Gravity exerts a force on the earth's atmosphere.
If a column of air 1 m2 in cross section exerts a force of 105 N.
Therefore, the pressure of a 1 m2 Column of air is 100 kPa (kilo Pascals)
SI Units of pressure: 1 N = 1 kg•m/s2; 1 Pa = 1 N/m2

The pressures of gases not open to the atmosphere are measured in manometers A manometer consists of a bulb of gas attached to a U-tube containing Hg pressure-gas

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Date of last modification: Summer , 2019