Steam和Vapor 有什么区别? steam (水)蒸汽 in physical chemistry, and in engineering, steam refers to vaporized water. it is a pure, completely invisible gas (for mist see below). at standard atmospheric pressure, pure steam (unmixed with air, but in equilibrium with liquid water) occupies about 1,600 times the volume of liquid water. in the atmosphere, the partial pressure of water is much lower than 1 atm, therefore gaseous water can exist at temperatures much lower than 100 c. vapor: 蒸气/气相 vapor or vapour is the gas phase component of another state of matter (e.g. liquid or solid) which does not completely fill its container. it is distinguished from the pure gas phase by the presence of the same substance in another state of matter. hence when a liquid has completely evaporated, it is said that the system has been completely transformed to the gas phase. gas:气体 the term gas refers to a compressible fluid phase, as in common usage. fixed gases are gases for which no liquid or solid can form at the temperature of the gas (such as air at typical ambient temperatures). a liquid or solid does not have to boil to release a vapor. the atmospheric boiling point of a liquid is the temperature at which the vapor pressure is equal to one atmosphere (unit) . 查看更多
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