객관식
Which of the following is always a reactant in a combustion reaction?
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3. Chemical Reactions
Combustion Analysis
객관식
Which of the following are direct products of the combustion of hydrocarbon fuels in automobile engines?
A
CH_4 and C_2H_6
B
CO_2 and H_2O
C
SO_2 and NH_3
D
O_2 and N_2
검증된 단계별 안내1
Understand that combustion of hydrocarbon fuels involves reacting the hydrocarbon with oxygen (O_2) to produce combustion products.
Recall that hydrocarbons are compounds made of carbon (C) and hydrogen (H) atoms only, such as CH_4 (methane) and C_2H_6 (ethane).
Write the general combustion reaction for a hydrocarbon: \(\text{C}_x\text{H}_y + O_2 \rightarrow \text{products}\).
Recognize that complete combustion of hydrocarbons produces carbon dioxide (CO_2) and water (H_2O) as the main products, because carbon atoms form CO_2 and hydrogen atoms form H_2O.
Note that SO_2 and NH_3 are not direct products of hydrocarbon combustion, and O_2 and N_2 are reactants or atmospheric gases, not products.
