What is the diffusion of water vapor

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Water vapor diffusion is a type of water molecule transport. In the case of H2O, it is airborne. By diffusion, however, the gas does not dissipate through the pressure differential as is common in the flow but the molecular flow. In this way, the pores or channels that are part of many building materials are also spreading. However, as the air is able to contain only a certain number of water molecules, it is not usually necessary to take into account the concentration of water vapor, but mainly its pressures, in diffusion calculations.