Question

CH4 → C2H2 → C2H4 → C2H2 → CH3CHO

Answer 1

CH4 → C2H2 → C2H4 → C2H2 → CH3CHO

1) 2CH4 >> t  (реакция протекает при температуре) >> C2H2 + 3H2

пояснение к уравнению реакции при необходимости: [метан >>> ацетилен + водород] - реакция крекинг

2) C2H2 + H2 >>> C2H4

[ацетилен + водород >>> этилен] - реакция гидрирования

3) C2H4 >>> C2H2 + H2

[этилен >>> ацетилен + водород] - реакция дегидрирования

4) C2H2 + H2O >>> CH3COH

[ацетилен + вода >>> этаналь] - реакция гидратации

Answer 2

The chemical reactions you provided are as follows:

1. CH4 (Methane) → C2H2 (Ethyne or Acetylene)
2. C2H2 (Ethyne or Acetylene) → C2H4 (Ethene or Ethylene)
3. C2H4 (Ethene or Ethylene) → C2H2 (Ethyne or Acetylene)
4. C2H2 (Ethyne or Acetylene) → CH3CHO (Acetaldehyde)

Let's go through each reaction step by step:

1. CH4 → C2H2 The first reaction appears to be the production of acetylene (C2H2) from methane (CH4). This reaction is a type of pyrolysis or thermal cracking. It can be represented as follows: CH4 → C2H2 + 2H2

2. C2H2 → C2H4 The second reaction involves the conversion of acetylene (C2H2) to ethylene (C2H4). This reaction is a hydrogenation reaction where acetylene reacts with hydrogen (H2) to form ethylene. C2H2 + H2 → C2H4

3. C2H4 → C2H2 The third reaction indicates the conversion of ethylene (C2H4) back to acetylene (C2H2). This can be achieved through a process known as dehydrogenation, where ethylene loses hydrogen to form acetylene. C2H4 → C2H2 + H2

4. C2H2 → CH3CHO The fourth reaction leads to the formation of acetaldehyde (CH3CHO) from acetylene (C2H2). This reaction involves a partial oxidation of acetylene. 2C2H2 + O2 → 2CH3CHO

So, overall, the reactions result in the transformation of methane (CH4) into acetaldehyde (CH3CHO) through a series of intermediate steps involving acetylene (C2H2) and ethylene (C2H4).