Vivian Marlowe
Ethyl alcohol, also known as ethanol, has the chemical formula C2H5OH. It is a type of alcohol used in beverages and as an alternative fuel for automobiles. The formula mass, or molar mass, of a substance is the mass of one mole of that substance. To calculate the molar mass of ethanol, we need to sum the atomic masses of carbon, hydrogen, and oxygen atoms in its chemical formula. So, what is the formula mass of ethyl alcohol, and how do we calculate it?
| Characteristics | Values |
|---|---|
| Chemical Name | Ethyl Alcohol |
| Formula | C2H5OH |
| Other Names | Ethanol, Grain Alcohol |
| Molar Mass | 46.069 g/mol |
| Density | 0.789 g/cm3 |
| Molecular Composition | 2 Carbon, 6 Hydrogen, 1 Oxygen |
Explore related products
What You'll Learn
Ethyl alcohol (C2H5OH) is also known as grain alcohol
Ethyl alcohol, also known as grain alcohol, has the chemical formula C2H5OH, which is also written as C2H6O or CH3CH2OH. It is an organic compound with two carbon atoms, six hydrogen atoms, and one oxygen atom. The molar mass of ethyl alcohol is approximately 46 g/mol, calculated by multiplying the subscript of each element in the formula by its molar mass (its atomic weight on the periodic table in g/mol).
Ethyl alcohol is a type of alcohol commonly found in alcoholic beverages and is also known as ethanol or drinking alcohol. It is a volatile, flammable, colourless liquid with a pungent taste. It is produced by the fermentation of sugars by yeasts or via petrochemical processes such as ethylene hydration. The fermentation process involves culturing yeast under favourable thermal conditions (around 35-40°C) to produce alcohol. The starch in starchy materials, such as cereal grains, must first be converted into sugars. This is traditionally done by allowing the grain to germinate or malt, producing the enzyme amylase. When the malted grain is mashed, the amylase converts the remaining starches into sugars.
The toxicity of ethanol to yeast limits the ethanol concentration obtainable by brewing, and higher concentrations are obtained through fortification or distillation. The most ethanol-tolerant yeast strains can survive up to approximately 15-18% ethanol by volume.
Ethyl alcohol is also used in modern thermometers and has various medical applications, such as an antiseptic, disinfectant, solvent for medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is further utilised as a chemical solvent, in the synthesis of organic compounds, and as a fuel source for lamps, stoves, and internal combustion engines.
The density of ethyl alcohol is 0.789 g/mL, and it is often abbreviated as EtOH, with Et representing the ethyl group (C2H5) in organic chemistry notation.
Understanding Alcoholism: AA's Definition of an Alcoholic
You may want to see also
Explore related products
It has a molar mass of 46.069 g/mol
Ethyl alcohol, also known as ethanol, has the chemical formula C2H5OH. This formula can also be written as C2H6O, which is used to calculate its molar mass. The molar mass of a substance is the mass of one mole of that substance, with a mole being a defined quantity of that substance. For molecules, the molar mass is calculated by multiplying the subscript of each element by its molar mass, which is its atomic weight on the periodic table in grams per mole.
The molar mass of ethanol is 46.069 grams per mole. This is calculated by multiplying the subscripts of each element in the ethanol molecule by their respective molar masses and then adding the results together. In this case, the two carbon atoms, each with a molar mass of 12.011 grams per mole, contribute a total of 24.022 grams per mole to the overall molar mass. The six hydrogen atoms, each with a molar mass of 1.008 grams per mole, contribute 6.048 grams per mole. Finally, the single oxygen atom, with a molar mass of 15.999 grams per mole, contributes the same amount to the total molar mass of ethanol.
The calculation of the molar mass of ethanol can also be simplified by recognising that the formula can be rewritten as C2H6O. This means that the subscripts for hydrogen can be combined, resulting in a calculation of 2 x 12.011 grams per mole for carbon, 6 x 1.008 grams per mole for hydrogen, and 1 x 15.999 grams per mole for oxygen, giving a total molar mass of 46.069 grams per mole. This calculation is based on the atomic weights of carbon, hydrogen, and oxygen as found on the periodic table.
The molar mass of ethanol is important in various contexts, including stoichiometry calculations and determining the number of moles of ethanol present in a given mass. For example, to find the number of moles in 789 grams of ethanol, we divide the mass by the molar mass: 789 grams / 46 grams per mole = 17.152 moles. This calculation can be used to determine the amount of substance present in a given sample or solution of ethanol.
The Art of Layering a Shot Glass
You may want to see also
Explore related products
It is produced by the fermentation of glucose or sucrose
The formula mass for ethyl alcohol, also known as ethanol, is C2H5OH, and it has a molar mass of 46.069 g/mol. This means that in one mole of ethanol, there are 46.069 grams of the substance.
Now, onto the production of ethanol through the fermentation of glucose or sucrose. Ethanol fermentation, or alcoholic fermentation, is a process that converts sugars such as glucose, fructose, and sucrose into ethanol and carbon dioxide. This biological process is carried out by yeast, some bacteria, or other microorganisms. During fermentation, yeast breaks down sugars to form pyruvate molecules through glycolysis. This process can be summarized by the equation:
> C6H12O6 + 2 ADP + 2 Pi + 2 NAD+ → 2 CH3COCOO− + 2 ATP + 2 NADH + 2 H2O + 2 H+
The pyruvate is then converted into ethanol and carbon dioxide in two steps, regenerating the oxidized NAD+ needed for glycolysis. This step is catalyzed by alcohol dehydrogenase (found in baker's yeast). The overall reaction for the fermentation of glucose to ethanol can be represented as follows:
> C6H12O6 → 2C2H5OH + 2CO2
This process is used in the production of alcoholic beverages, with the ethanol being distilled to the desired concentration. It is also employed in bread-making, where the carbon dioxide formed during fermentation causes the dough to rise. In addition, ethanol fermentation finds applications in the production of fuel, with the potential for use in vehicles when blended with petrol.
World's Strongest Alcoholic Drinks: A Dangerous Delight
You may want to see also
Explore related products
![McKesson Isopropyl Rubbing Alcohol 70% [1 Count] USP First Aid Antiseptic, 32 oz](https://m.media-amazon.com/images/I/61lYiXl9g9L._AC_UL320_.jpg)
Ethanol has 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom
The molecular formula for ethanol is C2H5OH, which means it contains 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom. This can be seen by breaking down the molecular formula into its constituent parts: C2, H5, and OH.
Carbon is represented by the letter C, and the subscript 2 in C2 indicates that there are two carbon atoms in each molecule of ethanol. Hydrogen is represented by the letter H, and the H5 in the formula indicates that there are five hydrogen atoms associated with the carbon atoms. The hydroxyl group, represented by OH, indicates that there is one hydrogen atom bonded to one oxygen atom. Therefore, the molecular formula for ethanol contains a total of 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom.
The molar mass of a substance is the mass of one mole of that substance. To calculate the molar mass of ethanol, we need to sum the atomic masses of carbon, hydrogen, and oxygen atoms in the molecule. Carbon has an atomic mass of 12 grams per mole, hydrogen has an atomic mass of 1 gram per mole, and oxygen has an atomic mass of 16 grams per mole. Using these values, we can calculate the molar mass of ethanol:
Molar mass of ethanol = (2 x 12 grams) + (6 x 1 gram) + (1 x 16 grams) = 46 grams per mole
Therefore, the molar mass of ethanol, C2H5OH, is 46 grams per mole. This means that one mole of ethanol contains 46 grams of carbon, hydrogen, and oxygen atoms in the ratio of 2:6:1, respectively.
Ethanol, also known as ethyl alcohol, is commonly used in alcoholic beverages and can be produced by the fermentation of sucrose or glucose. It has a density of around 0.789 to 0.79 g/mL and a boiling point of 78.4 degrees Celsius.
Lactic Acid vs Alcohol Fermentation: Which Yields More Energy?
You may want to see also
Explore related products
It is used in alcoholic beverages
Ethyl alcohol, also known as ethanol (C2H5OH), is a volatile, flammable, colourless liquid with a pungent taste. It is the active ingredient in alcoholic beverages and the second most consumed drug globally, after caffeine. Ethanol is typically produced through the fermentation of sugars by yeasts, or via petrochemical processes such as ethylene hydration.
Ethanol has been used as an intoxicant since ancient times, and its production through fermentation and distillation has evolved over centuries across various cultures. It is created when certain species of yeast metabolise sugar, producing ethanol and carbon dioxide. The most ethanol-tolerant strains of yeast can survive up to approximately 15% ethanol by volume.
Ethanol is also used in the production of alcoholic beverages. For example, wine can turn into vinegar when the ethanol in the wine reacts with oxygen from the air to form acetic acid, the main ingredient of vinegar. Additionally, ethanol is used to make ethyl halides, ethyl esters, diethyl ether, acetic acid, butadiene, and ethyl amines.
Ethanol has a variety of medical applications as well. It can be used as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is also used as a chemical solvent and in the synthesis of other organic compounds.
Alcohol in Vehicles: Fines and Legal Consequences
You may want to see also
Frequently asked questions
Ethyl alcohol, also known as ethanol, is a chemical compound with the formula C2H5OH. It is commonly used in alcoholic beverages and can be produced by the fermentation of sucrose or glucose.
The formula mass, or molar mass, of ethyl alcohol is 46.<069 g/mol. This is calculated by multiplying the subscript of each element in the formula by its molar mass: (2 x 12.011 g/mol) + (6 x 1.008 g/mol) + (1 x 15.999 g/mol) = 46.069 g/mol.
The formula mass of a compound is calculated by summing up the atomic masses of all the elements in the compound's chemical formula. The atomic masses of each element can be found on the periodic table.
The density of ethyl alcohol, or ethanol, is 0.789 g/cm^3 or 0.79 g/ml.
![McKesson Isopropyl Rubbing Alcohol 70% [12 Count] USP First Aid Antiseptic, 16 oz](https://m.media-amazon.com/images/I/614SGew9G8L._AC_UL320_.jpg)
