Measuring a Gas

STP and SATP

Definition

STP (Standard temperature and pressure: , (sea level)
SATP (Standard ambient temperature and pressure): ,

(see pascal)

Measurements for Pressure

List

- Displacement of mercury (Using Liquid Pressure to Determine Gas Pressure)
- Column of mercury 1mm in height at
and (pascal and kilopascal)
- Force of 1 newton per metre squared
(atmosphere)
- At sea level, air pressure is

Note that , so pressure and force are related but not the same.