Search results
Results From The WOW.Com Content Network
How much gas is present could be specified by giving the mass instead of the chemical amount of gas. Therefore, an alternative form of the ideal gas law may be useful. The chemical amount, n (in moles), is equal to total mass of the gas (m) (in kilograms) divided by the molar mass, M (in kilograms per mole): =.
Gas is loaded onto the medium during the high pressure phase and is released during the low pressure phase. Membrane gas separation – Gas is forced through a semi-permeable membrane by a pressure difference. Some of the constituent gases pass through the membrane more easily than the others, and the output from the low pressure side is ...
The atoms and molecules are so far apart that they can travel hundreds of kilometres without colliding with one another. Thus, the exosphere no longer behaves like a gas, and the particles constantly escape into space. These free-moving particles follow ballistic trajectories and may migrate in and out of the magnetosphere or the solar wind ...
By the equipartition theorem, internal energy per mole of gas equals c v T, where T is absolute temperature and the specific heat at constant volume is c v = (f)(R/2). R = 8.314 J/(K mol) is the universal gas constant, and "f" is the number of thermodynamic (quadratic) degrees of freedom, counting the number of ways in which energy can occur.
You must not speak of one isolated system but at least of two, which you may for the moment consider isolated from the rest of the world, but not always from each other." [99] The two systems are isolated from each other by the wall, until it is removed by the thermodynamic operation, as envisaged by the law. The thermodynamic operation is ...
A gas is a compressible fluid. Not only will a gas conform to the shape of its container but it will also expand to fill the container. In a gas, the molecules have enough kinetic energy so that the effect of intermolecular forces is small (or zero for an ideal gas), and the typical distance between neighboring molecules is much greater than ...
In a gas of particles of individual diameter 2r, the cross section σ, for collisions is related to the particle number density n, and mean free path between collisions λ. In a gas of finite-sized particles there are collisions among particles that depend on their cross-sectional size. The average distance that a particle travels between ...
At one point, when the overlap becomes significant, a macroscopic number of particles condense into the ground state. In condensed matter physics , a Bose–Einstein condensate ( BEC ) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero , i.e., 0 K (− ...