Evaporation describes the process of a liquid changing to a gas. Usually, the surface parts of a pool of liquid vaporize into a vapor or gas first. Evaporation occurs in both cold and warm liquids.Know More
Warmer liquids evaporate quicker than cooler liquids. This is due to the fact that adding more energy to a liquid causes some of the molecules to become energized enough to release the liquid into the air. An example of this is when a pot of water boils on a stove. Once the water gets hot enough, liquid water converts and changes phases into a gas; if enough of the water is evaporating, it becomes visible as steam. Cold water can also evaporate.
Molecules in a liquid actually have different levels of energy. When this happens, some of the water converts into gas; that is why wind can increase evaporation rates. Evaporation also removes heat from a system, which is why when water evaporates on someone’s skin, they then feel cooler.
Evaporation is the mechanism that drives the water cycle. When water evaporates from the oceans, it rises into the atmosphere and eventually falls again as rain, which is then fresh water since the evaporating water loses all of the salt from the oceans.Learn More
Mustard gas, also known as sulfur mustard, is the organic compound (CI-CH2-CH2)2S that is created when sulfur mustard is synthesized by treating sulfur dichloride with ethylene. There is other methods for creating this toxic chemical agent, but they all typically attack the same areas of the human anatomy, such as the eyes, skin, lungs and gastro-intestinal tract.Full Answer >
The water cycle is responsible for distributing water across the earth through evaporation, condensation and precipitation, a process that is vital for sustaining life on earth by providing water to plants, animals and humans. It is also the driving force behind the earth's climate. Clouds are formed through condensation, and temperature is regulated through evaporation and water vapor in the air.Full Answer >
Most of the helium gas used to fill balloons is a mixture because commercial helium is seldom pure. Usually, it contains impurities in the form of nitrogen and oxygen gas. However, the helium present in this mixture is also a substance.Full Answer >
Potassium and oxygen react to form potassium superoxide, not potassium oxide directly. Potassium oxide is an ionic compound that requires a doubly-ionized oxygen atom, which is not oxygen gas, in order to chemically react with two positively-charged potassium ions.Full Answer >