What is the difference between steam and vapor?

Water in its gaseous state should be called vapor, I guess. Vapor probably refers to a state of unsaturation.

Found online: The difference between “steam” and “vapor”. These two terms are distinct and cannot be used interchangeably. “The extension of “steam vapor” is greater than that of “steam”; “steam” is included within “steam vapor”. “The character “qi” in “steam” refers to various gases, such as “poison gas,” “gas,” “biogas,” etc ； Any gas that results from the evaporation, boiling, or sublimation of a liquid or solid (such as water, mercury, benzene, iodine) can be called \"vapor\". And “steam” specifically refers to gaseous water, that is, “water vapor”. The two terms cannot be used interchangeably. For example, an engine that uses steam to generate power can only be referred to as a “steam engine”” ； A hammer powered by steam should be simply referred to as a \"steam hammer\", and not written as a \"gas hammer\". Additionally, discussions on this topic have already taken place on this forum; please refer to: http://bbs.hcbbs.com/viewthread.php?tid=418917&highlight=%D5%F4%C6%FB%D3%EB%D5%F4%C6%F8%B5%C4%C7%F8%B1%F0

Steam generally refers to superheated steam, that is, gas with a temperature higher than the boiling point at the corresponding pressure; whereas vapor usually refers to saturated steam, that is, gas with a temperature equal to the boiling point at the corresponding pressure.

In reality, they are usually used together; there’s no need to be too precise about it! As I understand it, vapor is related to water ； Gas is any system other than water!

What was said upstairs is correct; “steam” is related to water, that is, water vapor. “Vapor” refers to gases other than water vapor

Simply put, steam is the gas that forms when water in an aqueous solution evaporates at its boiling point. The gas that flashes off from other solutions once they reach the evaporation temperature is called vapor

From elementary school Chinese textbooks, hehe – the difference between “steam” and “vapor”. These two terms are different and cannot be used interchangeably. “The extension of “steam vapor” is greater than that of “steam”; “steam” is included within “steam vapor”. “The character “qi” in “steam” refers to various gases, such as “poison gas,” “gas,” “biogas,” etc ； Any gas that results from the evaporation, boiling, or sublimation of a liquid or solid (such as water, mercury, benzene, iodine) can be called \"vapor\". And “steam” specifically refers to gaseous water, that is, “water vapor”. The two terms cannot be used interchangeably. For example, an engine that uses steam to generate power can only be referred to as a “steam engine”” ； A hammer powered by steam should be simply referred to as a \"steam hammer\", and not written as a \"gas hammer\".