The Source Selection IPT consists of standing members from the NAVAIR Acquisition Policy and Processes Department, AIR-2.1, AIR-4.10E, Logistics Management Integration Department, and a AIR-11.0 Senior Attorney, with AIR-4.10E and AIR-2.1 as the Co-Chairs.
9.2.7.1 Basic Definitions Critical temperature (T c)The maximum temperature at which a gas can be converted into a liquid by an increase inpressure. Critical pressure (p c)The minimum pressure which would suffice to liquefy a substance at its criticaltemperature. Above the critical pressure, increasing the temperature will not cause a fluidto vaporize to give a two-phase system.
The vapor pressure of a liquid is the pressure exerted by its vapor when the liquid and vapor are in dynamic equilibrium. If we were to place a substance in an evacuated, closed container, some of it would vaporize. The pressure in the space above the liquid would increase from zero and eventually stabilize at a constant value, the vapor pressure. It is important to specify the temperature when stating a vapor pressure because vapor pressures increase with temperature.