Arielle Cruz
Ethyl alcohol, also known as ethanol, is a monohydric alcohol with the chemical formula C2H5OH. It is a common ingredient in alcoholic beverages and can be produced by the fermentation of sucrose or vegetable carbohydrates in yeast. To determine the gram formula mass of ethyl alcohol, one must calculate its molar mass, which is defined as the mass of one mole of the substance. The molar mass of ethanol is calculated by multiplying the subscript of each element in its chemical formula by its molar mass or atomic weight.
| Characteristics | Values |
|---|---|
| Chemical Formula | C2H5OH, C2H6O, CH3CH2OH |
| Number of Atoms | 2 carbon atoms, 6 hydrogen atoms, 1 oxygen atom |
| Molecular Mass | 46.07 g/mol |
| Molar Mass | 46 g/mol |
| Density | 0.789 g/cm3 |
| Boiling Point | 78.37 °C |
| Melting Point | -114.3 °C |
| Enthalpy of Combustion | 1380.7 kJ mol-1 |
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What You'll Learn
- The chemical formula of ethyl alcohol is C2H6O or C2H5OH
- The molar mass of ethyl alcohol is 46 grams
- The molecular weight of a compound is calculated by multiplying the atomic weight of each element in its chemical formula
- Ethyl alcohol is produced by the fermentation of sucrose
- Ethyl alcohol reacts with sulfuric acid to form diethyl ether
The chemical formula of ethyl alcohol is C2H6O or C2H5OH
The chemical formula of ethyl alcohol, also known as ethanol, is given as C2H6O or C2H5OH. This organic compound was first described by French chemist Antoine Lavoisier in the early 19th century as a compound of carbon, hydrogen, and oxygen. It wasn't until 1807 or 1808 that Nicolas-Théodore de Saussure determined ethanol's chemical formula.
The formula C2H6O indicates that each molecule of ethanol contains two carbon atoms, six hydrogen atoms, and one oxygen atom. This can also be represented as C2H5OH, where the OH indicates that ethanol is an alcohol. The OH group is known as a hydroxyl group, and it is responsible for ethanol's polarity and ability to form hydrogen bonds with other molecules. This makes ethanol a very useful solvent, capable of dissolving both polar and non-polar substances.
The molar mass of ethanol is approximately 46 grams per mole. This can be calculated by multiplying the number of atoms of each element in the molecule by their relative atomic masses. So, for C2H5OH, we have:
> (2 × 12.011 g/mol) + (6 × 1.008 g/mol) + (1 × 15.999 g/mol) = 46.069 g/mol
Ethanol is a volatile, flammable liquid with a pungent taste and a sharp, intensely aromatic odour. It is the active ingredient in alcoholic beverages and is the second most consumed drug globally, after caffeine. It has a variety of industrial uses, including as a solvent, a fuel source, and in the synthesis of organic compounds.
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The molar mass of ethyl alcohol is 46 grams
The gram formula mass, or molar mass, of a substance is the mass of one mole of that substance. In other words, it tells us how many grams are in one mole of that substance. The molar mass is calculated by multiplying the subscript of each element in the substance's chemical formula by its molar mass, which is its atomic weight on the periodic table in grams per mole (g/mol).
The chemical formula for ethyl alcohol, also known as ethanol, is C2H5OH. This means that a molecule of ethanol contains two carbon atoms, five hydrogen atoms, and one oxygen atom. To calculate the molar mass of ethanol, we need to find the molar mass of each element in the molecule and then add them together.
The molar mass of carbon is 12.011 g/mol, the molar mass of hydrogen is 1.008 g/mol, and the molar mass of oxygen is 15.999 g/mol. Multiplying the subscript of each element in the formula by its molar mass and then adding them together, we get:
2 x 12.011 g/mol) + (5 x 1.008 g/mol) + (1 x 15.999 g/mol) = 46.069 g/mol
Therefore, the molar mass of ethyl alcohol is approximately 46 grams per mole. This value can also be expressed as 46.07 g/mol or 46 g/mol.
The molar mass of a substance is important because it allows us to convert between grams and moles of that substance. It also helps us understand the relative weights of reagents and products in a chemical reaction. For example, knowing the molar mass of ethanol allows us to determine how many grams of ethanol are in a given volume or how many moles of ethanol are present in a certain mass.
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The molecular weight of a compound is calculated by multiplying the atomic weight of each element in its chemical formula
For example, to calculate the molar mass of ethyl alcohol (C2H5OH), you would multiply the atomic weight of each element in the compound by the number of atoms of that element present in the molecule. Carbon has an atomic weight of 12 g/mol, hydrogen has an atomic weight of 1 g/mol, and oxygen has an atomic weight of 16 g/mol. So, for ethyl alcohol, you would calculate it as follows:
Molar mass of C2H5OH = (2 x 12.011 g/mol) + (6 x 1.008 g/mol) + (1 x 15.999 g/mol) = 46.069 g/mol
The molar mass of a compound is the sum of the atomic masses of all the atoms in a molecule. This can be determined using the periodic table to find the atomic mass of each element in the molecule. The molecular formula of the molecule is also important, as it indicates the number of atoms of each element in the molecule. This is represented by the subscript next to the element symbol in the formula. For example, in the formula C2H5OH, there are two carbon atoms, six hydrogen atoms, and one oxygen atom.
The molar mass of a compound is also important in determining its molecular formula. The molecular formula of a compound is the kind and number of atoms of each element present in the molecule. To determine the molecular formula, you need to know the molar mass of the compound, which can be calculated using its empirical formula and molar mass.
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Ethyl alcohol is produced by the fermentation of sucrose
Ethyl alcohol, also known as ethanol, is a colourless, pungent-tasting, flammable liquid with a low boiling point. It is a monohydric alcohol with the chemical formula C2H5OH or C2H6O. The molar mass of ethanol is 46 grams per mole or 46.07 grams per mole, depending on the source. It is a volatile substance with a sharp, intensely aromatic taste and a slightly sweet aftertaste.
Ethanol is produced both as a petrochemical, through the hydration of ethylene, and via biological processes by fermenting sugars with yeast. Yeast organisms consume sugars and produce ethanol and carbon dioxide as waste products. This process is known as ethanol fermentation or alcoholic fermentation. It is considered an anaerobic process as it occurs in the absence of oxygen.
Ethanol fermentation is a biological process that converts sugars such as glucose, fructose, and sucrose into ethanol and carbon dioxide. This process can be summarised by the following equation:
> C6H12O6 + 2 ADP + 2 Pi → 2 C2H5OH + 2 CO2 + 2 ATP
During ethanol fermentation, the yeast breaks down the sucrose molecule (C12H22O11) into ethanol (C2H5OH) and carbon dioxide (CO2). The sucrose molecule is made up of one glucose molecule and one fructose molecule joined together. The yeast metabolises the glucose and fructose molecules, producing two ethanol molecules and two carbon dioxide molecules, along with cellular energy in the form of adenosine triphosphate (ATP).
The fermentation of sucrose to produce ethyl alcohol is a widely used process, with applications in various industries. It is the basis for alcoholic beverages, ethanol fuel, and bread dough rising. Additionally, ethanol is used as a chemical solvent, a universal solvent capable of dissolving a wide range of compounds, and in the synthesis of other organic compounds.
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Ethyl alcohol reacts with sulfuric acid to form diethyl ether
Ethyl alcohol, also known as ethanol, is a monohydric alcohol with the chemical formula C2H5OH. It is a volatile liquid with a pungent odour and a sharp, intensely aromatic taste. Its molar mass is 46 grams per mole, calculated by adding the atomic masses of its constituent elements: carbon, hydrogen, and oxygen.
Ethanol reacts with sulfuric acid to form diethyl ether. This reaction occurs when the temperature rises to approximately 120 °C, and the optimal temperature range for this process is 130-140°C. At higher temperatures, around 150 °C and above, the formation of ethylene becomes a competing reaction. This process involves heating ethanol, which undergoes protonation of its nucleophilic oxygen atom by the addition of sulfuric acid. This protonation results in the formation of the conjugate acid of ethanol and the release of water. Subsequently, the remaining ethanol molecules react with the conjugate base, leading to the formation of diethyl ether, hydrogen ions, and water.
The reaction mechanism involves the nucleophilic oxygen of ethanol attracting a proton from sulfuric acid due to its high electron density. This protonation breaks the bond between carbon and oxygen in the ethanol molecule, allowing the oxygen atom to form a new bond with a hydrogen atom. The ethyl alcohol conjugate base is then formed, releasing water. The carbon atom, being more electronegative and electrophilic, replaces the hydrogen atom in the conjugate base, ultimately forming diethyl ether.
Diethyl ether synthesis from ethanol and sulfuric acid is a classic example of acid-catalysed ether formation. This reaction is relatively specific to symmetrical ether formation and is less effective for producing unsymmetrical ethers. Additionally, the temperature must be carefully controlled to prevent side reactions and optimise the yield of diethyl ether.
In summary, ethyl alcohol (ethanol) reacts with sulfuric acid through a nucleophilic substitution reaction, resulting in the formation of diethyl ether. This process involves protonation, conjugate base formation, and the release of water molecules, ultimately yielding diethyl ether, hydrogen ions, and water. The reaction is temperature-dependent and is commonly employed in the synthesis of symmetrical ethers.
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Frequently asked questions
The gram formula mass, or molar mass, of ethyl alcohol is 46 grams per mole.
To calculate the molar mass of ethyl alcohol (C2H5OH), you multiply the subscript of each element in the compound by its molar mass (its atomic weight on the periodic table in g/mol). So, for ethyl alcohol:
(2 x 12.011 g/mol) + (6 x 1.008 g/mol) + (1 x 15.999 g/mol) = 46.069 g/mol
The formula for calculating molar mass is:
Molar mass = (number of atoms of element 1 x atomic weight of element 1) + (number of atoms of element 2 x atomic weight of element 2) +...
