Properties of Pressure
- Pressure increases as more gas is added
- Conclusion - Pressure (P) is directly proportional to moles of gas (n)
- Pressure is measured in units that describe force exerted by the gas divided by area over which the gas is distributed.
- e.g. lb/in2
- Conclusion -
- Pressure due to a gas is the same in all directions whereas pressure due to weight is directional
|Barometer - apparatus
used to measure pressure;
derived from the Greek "baros" meaning "weight"
dish until the force of the Hg inside the tube
balanced the force of the atmosphere on the
surface of the liquid outside the tube