Vapor is a substance in the gas state, but below its critical temperature, meaning it can return to a liquid phase solely by an increase in pressure. It often forms through evaporation from a liquid or sublimation from a solid.
Vapor is a substance in the gas state, but below its critical temperature, meaning it can return to a liquid phase solely by an increase in pressure. It often forms through evaporation from a liquid or sublimation from a solid.