When we say we have “70% ethyl alcohol”, it means that the bottle contains 70% pure alcohol and the remaining 30% is usually water. The water is mixed in so that the alcohol is not too strong and can be used safely. The boiling point of water is about 100 degrees Celsius, which is higher than the boiling point of alcohol (78°C).
what is boiling point of ethyl alcohol
Alcohols generally have much higher boiling points than alkenes of similar molecular weight. For example, ethanol has a molecular weight of 46 and a boiling point of about 78 °C (173 °F). Propane, on the other hand, which has a molecular weight of 44, boils at only −42 °C (−44 °F). This difference is because alcohols have hydrogen bonding, which holds the molecules together tightly, while alkenes do not. Therefore, alcohols require more energy to boil.
The Myth About Cooking Alcohol out of Food
Many people assume that if alcohol is added to food during cooking, it will simply leave a taste and evaporate on its own. This seems to be true, because alcohol begins to boil off at temperatures above 78 degrees Celsius (173 °F), leaving behind water. But scientists at the University of Idaho’s Department of Agriculture have found that most cooking methods don’t actually reduce the alcohol content as much as people often think. This means that some amount of alcohol often remains in food, even when it’s heated for a long time.
Ethanol
- C2H6O
- Molecular weight: 46.0684
- IUPAC Standard InChI: InChI=1S/C2H6O/c1-2-3/h3H,2H2,1H3 Copy
- IUPAC Standard InChIKey: LFQSCWFLJHTTHZ-UHFFFAOYSA-N Copy
- CAS Registry Number: 64-17-5
- Chemical structure:
- Chemical structure:
Importance of Ethanol
Ethanol is a very important industrial chemical. It is widely used to produce various organic compounds, such as ethyl halides, ethyl esters, diethyl ether, acetic acid, and ethyl amines. Due to its special molecular structure, ethanol is also called the “universal solvent” because it is capable of dissolving both polar (water-loving) and non-polar (water-repellent) types of compounds. Due to its relatively low boiling point, it is also easy to separate from a solution. This is why it is considered a popular solvent in the extraction of plant oils. Ethanol is also often used in the production of cannabis oil, not only as an extraction solvent but also to remove excess oils, waxes, and chlorophyll from the solution in later stages, a process called winterization.
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