The gas state of liquid substances refers to the state of matter in which a liquid substance has been converted into a gas through the process of evaporation.
Water vapor forms when liquid water is heated and converted into a gas. It can also form through the process of evaporation, which occurs when water is exposed to air and its molecules gain enough energy to escape into the atmosphere.
Water vapor is colorless, odorless, and tasteless. It is less dense than liquid water and can expand to fill any space it is contained in. It is also highly reactive and can easily dissolve other substances.
Studying water vapor is important for understanding the water cycle and its impact on weather patterns. Water vapor also plays a crucial role in regulating Earth's temperature through the greenhouse effect.
Water vapor is measured using various instruments such as hygrometers, which measure humidity, and dew point meters, which measure the temperature at which water vapor begins to condense into liquid water.