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Vapour density is the density of a vapour in relation to that of hydrogen. It may be defined as mass of a certain volume of a substance divided by mass of same volume of hydrogen. vapour density = mass of n molecules of gas / mass of n molecules of hydrogen gas .
Vapor density is defined as the mass of a vapor per unit volume, typically expressed in grams per liter (g/L). It is an important characteristic that influences how gases behave in various conditions, particularly during the extraction, processing, and transportation of oil and gas.
Densities and molecular weights of common gases like acetylene, air, methane, nitrogen, oxygen and others.
While density describes the mass per unit volume of a substance, vapor density specifically refers to the density of gases or vapors compared to air. They differ in units, dependence on temperature and pressure, state of matter, and practical applications.
Vapor density is defined as the relative weight of a gas or vapor compared to air, which has an arbitrary value of one. If a gas has a vapor density of less than one it will generally rise in air. If the vapor density is greater than one the gas will generally sink in air.
Accurate thermophysical properties are available for several fluids. These data include the following: Density. C p. Enthalpy. Internal energy. Viscosity. Joule-Thomson coefficient. Specific volume.
The density of a gas or vapour relative to hydrogen, oxygen, or air. Taking hydrogen as the reference substance, the vapour density is the ratio of the mass of a particular volume of a gas to the mass of an equal volume of hydrogen under identical conditions of pressure and temperature.