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Revision notes on 4.4.2 Reactions of Alcohols for the OCR A Level Chemistry syllabus, written by the Chemistry experts at Save My Exams.
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula CH3CH2OH. It is an alcohol, with its formula also written as C2H5OH, C2H6O or EtOH, where Et stands for ethyl.
At 35 – 55 oC, sugars such as glucose can be fermented by yeast and turned into ethanol and carbon dioxide. This process must be carried out in the absence of air: C6H12O6 2C2H5OH + 2CO2. This process has a number of advantages: it is a low-technology process, which means it can be used anywhere.
It is easier to understand what happens if ethanol is shown as CH 3 CH 2 OH in the balanced equation: ethanol + oxidising agent → ethanoic acid + water CH 3 CH 2 OH + 2[O] → CH 3 COOH + H 2 O
The OH group and hydrogen of adjacent carbons are removed forming a C=C bond; The equation for the dehydration of ethanol would be; CH 3 CH 2 OH → CH 2 =CH 2 + H 2 O. Phosphoric acid does not appear in the equation as the water formed dilutes the concentrated phosphoric acid
Chemical equation for ethanol (CH 3 CH 2 OH) vaporizing CH 3 CH 2 OH (l) → CH 3 CH 2 OH (g) Ethanol is highly evaporative chemical and liquid phase is readily converted to gaseous phase.
19 wrz 2011 · Low molecular weight alcohols such as ethanol have replaced other additives as octane boosters in automotive fuels. Adding alcohols to petroleum products allows the fuel to combust more completely due to the presence of oxygen, which increases the combustion efficiency and reduces air pollution.
