Explanation of characters: water vapor/water vapour
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This post was last edited by Liu Suifeng on 2010-7-1 18:59. Explanation of characters: Water vapor – what’s the difference? Today, July 1, 2010, two more terms have been added. What’s the difference between cavitation margin and head?
From a thermophysical perspective: Water vapor refers to the state in which all the water in a particular space exists in gaseous form; of course, certain physical conditions must be met for this to occur. Water vapor: refers to the state in which water exists in a specific space as a gas-liquid two-phase system, where the liquid phase can exist in the form of a \"fog\" or as a collection of numerous liquid droplets; of course, certain physical conditions must be met for this to occur. In practical applications, what is encountered the most refers to “water vapor”.
So, superheated steam is superheated steam, while saturated steam is simply saturated steam
Superheated steam is dry steam, free of water; saturated steam is in two-phase equilibrium
The gas is dry; there is no liquid phase present； Vapor exists in both gas and liquid phases.
1. The claim that water vapor is white is incorrect, as water vapor is in a gaseous state and cannot be seen with the naked eye. What we see as “white mist” are actually small water droplets formed when water vapor cools and liquefies; in the air, water vapor remains a gas. 2. The white mist surrounding the ice cream is actually small water droplets formed when the water vapor in the air around the ice cream liquefies upon coming into contact with the cold air surrounding it; in essence, it is liquid water (small water droplets). Moreover, there is no such thing as \"steam\" alone – only water vapor exists. What was stated earlier is correct, while the latter part contains a spelling error. Water vapor and steam: obviously, one is a gas while the other is steam. Gas exists in its pure molecular form, with individual H2O molecules. Steam, on the other hand, is in a liquefied state, with many molecules coming together to form tiny water droplets that can be seen with the naked eye. Suspended in the air. The white mist surrounding ice cream is actually formed by water vapor (water molecules) in the air condensing into liquid water; true water vapor is invisible
Water vapor and steam are both forms of water’s existence; the difference is that, in the absence of heat exchange, what exists or may precipitate as water is called water vapor, while what does not exist or cannot precipitate as water is called steam.
Water vapor emphasizes the character for \"gas,\" meaning it is in a gaseous state. Water vapor emphasizes the character for \"steam\"; it consists of tiny liquid water droplets that, because they are so small, float in the air. What appears white to us is nothing other than this. Water vapor is strictly speaking colorless. Water vapor refers to a mixture of water vapor and tiny water droplets; for example, the \"white steam\" that appears when a pot is lifted off the heat, which can be simply referred to as \"water vapor.\"” ； Water vapor refers to the gaseous state of water; for example, air contains about 0.3% water vapor, which is why it doesn’t feel as dry as in a desert. From the perspective of describing the physical state of matter (physical chemistry), water vapor is correct ； In everyday conversation, it is generally used to describe heavy fog or \"water vapor,\" in which case it should refer to water vapor.