Ethanol

Ethanol

Presented by: Minh Anh [email protected]

What is Ethanol?

• Ethanol is a colorless odorless liquid. In aqueous solution, it has a sweet flavor. • Ethanol melts at -114.1deg C, boils at

78.5deg C. and has a density of 0.789g/mL at 20deg C.

Ethanol, CH3CH2OH, is an alcohol, one of a group of

chemical compounds whose molecules contain a hydroxyl group bonded to a carbon atom. It can dehydrate to form

ether.

Transformation of Ethanol into Acetic Acid

• Ethanol can oxidize to form acetaldehyde and then acetic acid.

• Acetic acid is one of the simplest carboxylic acids. It is an important chemical reagent, mainly used in the production of cellulose acetate. In households, diluted acetic acid is often used in descaling agents.

Ethanol makes a good fuel for cars because it reduces the emission of harmful gases such as carbon monoxide.

Ethanol fuel • Advantages:–Raises octane rating–Fuel burns more cleanly–Acts as a fuel line anti-freeze–the reduced dependence on imported oil

• Disadvantages:–Ethanol production requires a lot of corn. it is

costly to produce and use.–Can only be used in flex-fuel vehicles–Limited availability.

ETHANOL IN BEER• FOUR SIMPLE INGREDIENTS

1. Barley: • The seed of a grain that looks like wheat

2. Water 3. Hops:• Flower of hop vine• Contains acids that give bitterness and oils that give flavor• Stops the growth of bacteria that spoil beer

4. Yeast:• Single-celled micro-organism responsible for creating

alcohol and CO2

BREWING• The mash– Converts starches in barley to fermentable sugars

• Boiling wort– Hops and yeast are added– Solids separated

• Fermentation– Yeast converts glucose in wort to ethanol and

CO2

–Glucose enters the yeast and keeps doing so as long as glucose is present–Glucose broken down through glycolysis

Ethanol Structures• The structural formula is CH3CH2OH.

• The molecular formula is C2H5OH.• Ethanol structural formula showing bond links between the component

Atoms• The single lines between the atoms represent single Covalent bonds.• Each carbon atom has four bonds.• Each oxygen atom has two bonds. • Each hydrogen atom has one bond

Ethanol is used in the manufacture of alcoholic drinks, e.g. Whisky, etc.

• An alcoholic beverage is a drinks containing ethanol or alcohol. There are three general classes of alcoholic beverages: beers, wine, and spirits.

The Alcohol Content of Beverages(STANDARD GLASSES)

Fortified Wine

GLASS: 60ml

ALCOHOL CONTENT:10.ml - 17.5%

Beer

GLASS: 285ml

ALCOHOL CONTENT:11.4ml - 4%

Wine

GLASS: 100ML

ALCOHOL CONTENT:11.5ml - 11.5%. .

Spirit

GLASS: 200ML

ALCOHOL CONTENT:11.4ml- contains one 30ml nip of spirits (38%)