Under the ASTM Method D 323 (Reid vapour pressure), it is the absolute vapour pressure exerted by a liquid at 100°F. The higher this value, the more volatile the sample and the more readily it will evaporate. Unlike distillation data, vapour pressure provides a single value that reflects the combined effect of the individual vapour pressure of the different petroleum fractions in accordance with their mole ratios. It is thus possible for two wholly different products to exhibit the same vapour pressure at the same temperature - provided the cumulative pressures exerted by the fractions are the same. A narrow-cut distillate, for example, may exhibit the same vapour pressure as that of a dumbbell blend, where the effect of heavy fractions is counterbalanced by that of the lighter ones. In conjunction with other volatility data. Reid vapour pressure plays a role in the prediction of gasoline performance.
It is absolute vapor pressure exerted by a liquid at 100 °F. It is a measure of volatility. It is measured by ASTM-D-323 test method.
Reid is simply the name of the man who designed the test apparatus for measuring vapor pressure.
15 psi
high pressure vapor
When you add a teaspoon of honey to water with vapor pressure, it will reduce the vapor pressure. The sugar in the honey leads to the pressure going down.
I do not now
A delisquiscent.
Reid vapor pressure (RVP) of gasoline is the vapor pressure at 100°F.
100 + psi
The volatility of gasoline.
The amount of light components in the oil affect the reid vapor vapor pressure. In petroleum products such as gasoline, the amount of butane in the gasoline blend has a strong affect on the Reid Vapor Pressure. To reduce RVP more stripping steam can be added to the product strippers. The fractionation in the debutanizer might also need to be adjusted to affect the RVP.
15 psi
DVPE is RVP (Reid Vapor Pressure)
its just under 0.5 pounds.
http://www.epa.gov/ttn/chief/ap42/ch07/final/c07s01.pdf page 56
Depends on temperature. For ASTM D323 the RVP of water is ~49.5 mmHg (torr) gauge or ~809 mmHg absolute (assuming standard pressure). FYI - ASTM D323 is measured at 100F.
At higher temperature the vapor pressure is higher.
Lose Effloresce
high pressure vapor