Physics, asked by hemangipagdhare650, 3 months ago


(11) Answer the following questions
(a) Write the structural formula of Ethanol,
(b) What happens when ethanol is burnt in air?
(c) State the physical properties of ethanol​

Answers

Answered by chpavithra
2

Answer: (a) bit answer is given in image

(b) Answer: When ethanol is burnt, it reacts with oxygen and produces water and carbon dioxide. The chemical equation of the combustion of ethanol is: The combustion of ethanol is an exothermic reaction. ... In summary, when ethanol burns, it reacts with oxygen to produce carbon dioxide, water and heat.

(c) Answer : The chemical compound ethanol, also known as ethyl alcohol or grain alcohol, is the bio-alcohol found in alcoholic beverages. When non-chemists refer to "alcohol", they almost always mean ethanol. It is also increasingly being used as a fuel (usually replacing or complementing gasoline). Ethanol's chemical formula is C2H5OH.

Properties

Pure ethanol is a flammable, colorless liquid with a boiling point of 78.5° C. Its low melting point of -114.5° C allows it to be used in antifreeze products. It has a pleasant odor reminiscent of whiskey. Its density is 789 g/l about 20% less than that of water. It is easily soluble in water and is itself a good solvent, used in perfumes, paints and tinctures. Alcoholic drinks have a large variety of tastes, since various flavor compounds are dissolved during brewing. >A solution of 70-85% of ethanol is commonly used as a disinfectant; it kills organisms by denaturing their proteins and dissolving their lipids: it is effective against most bacteria and fungi, and many viruses, but is ineffective against bacterial spores. This disinfectant property of ethanol is the reason that alcoholic beverages can be stored for a long time.

Ethanol can lose a proton from the hydroxyl group and is a very weak acid, weaker than water. The CAS number of ethanol is 64-17-5 and its UN number is UN 1170.

Attachments:
Answered by nobody891
4

Answer:

(a)C2H5OH is its structural formula

Explanation:

(b)when ethanol is burnt is air its reacts with oxygen and produce carbon dioxide ,water vapours and heat

the combustion of ethanol is exothermic reaction

(c)ethanol is an colorless liquid its taste like ..grape wine .flash point 55°f density 6.5 lb/gal its vapour are heavier then air

its molecular formula is C6H6O

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