Alcohols：練習題

Which substances are produced during the complete combustion of ethanol, \(C_2H_5OH\)?

Which statement comparing the manufacture of ethanol by fermentation and by the catalytic hydration of ethene is correct?

State two major industrial uses of ethanol.

State the temperature, pressure, and the specific catalyst required for the catalytic addition of steam to ethene to produce ethanol.

Ethanol is an important organic compound with various industrial and domestic uses. It can be manufactured by two main methods.

(a) Describe the two different methods for manufacturing ethanol, including the raw materials, essential conditions (temperature, pressure, catalyst where applicable), and balanced chemical equations for each process.

(b) Compare these two methods, stating one advantage and one disadvantage for each in terms of economics or environmental impact.

(c) State two common uses of ethanol.

Ethanol is a member of the alcohol homologous series and is used as both a solvent and a fuel.

(a) Ethanol can be produced by the fermentation of aqueous glucose.

(i) State two conditions required for fermentation to occur effectively.

(ii) Name the substance that must be absent during this process to prevent the ethanol from being oxidized.

(b) Suggest one advantage and one disadvantage of manufacturing ethanol by fermentation compared to the catalytic addition of steam to ethene.

(c) Write a balanced chemical equation for the complete combustion of ethanol, \( \text{C}_2\text{H}_5\text{OH} \).