Question
Which of the following shows a valid combustion reaction?
C2H4 + 3O2 → 2CO2 + 2H2O
2Al + 2O2 → 2AlO + O2
2CH4 + O2 → 2CO + 4H2
Ca + O2 → CaOH
C2H4 + 3O2 → 2CO2 + 2H2O
2Al + 2O2 → 2AlO + O2
2CH4 + O2 → 2CO + 4H2
Ca + O2 → CaOH
Answers
GPT-4o mini
The first equation shows a valid combustion reaction:
**C2H4 + 3O2 → 2CO2 + 2H2O**
This equation represents the complete combustion of ethylene (C2H4) in the presence of oxygen (O2), resulting in carbon dioxide (CO2) and water (H2O), which is characteristic of a combustion reaction.
The other equations do not represent valid combustion reactions:
- **2Al + 2O2 → 2AlO + O2** does not show a standard combustion reaction and is not balanced correctly. Aluminum typically forms Al2O3 rather than AlO.
- **2CH4 + O2 → 2CO + 4H2** does not represent a complete combustion reaction because it produces carbon monoxide (CO) and hydrogen gas (H2) instead of carbon dioxide and water.
- **Ca + O2 → CaOH** is incorrect because calcium oxide (CaO) would be formed instead of calcium hydroxide (CaOH).
Thus, only the first reaction is a valid combustion reaction.
**C2H4 + 3O2 → 2CO2 + 2H2O**
This equation represents the complete combustion of ethylene (C2H4) in the presence of oxygen (O2), resulting in carbon dioxide (CO2) and water (H2O), which is characteristic of a combustion reaction.
The other equations do not represent valid combustion reactions:
- **2Al + 2O2 → 2AlO + O2** does not show a standard combustion reaction and is not balanced correctly. Aluminum typically forms Al2O3 rather than AlO.
- **2CH4 + O2 → 2CO + 4H2** does not represent a complete combustion reaction because it produces carbon monoxide (CO) and hydrogen gas (H2) instead of carbon dioxide and water.
- **Ca + O2 → CaOH** is incorrect because calcium oxide (CaO) would be formed instead of calcium hydroxide (CaOH).
Thus, only the first reaction is a valid combustion reaction.