Multiple Choice
Which of the following is required to initiate the combustion of methane (CH_4) in an energy-releasing reaction?
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3. Chemical Reactions
Combustion Analysis
Multiple Choice
In the balanced combustion reaction of nitric oxide (2 NO + O_2 → 2 NO_2), how many chemical bonds are broken in the reactants per mole of reaction?
A
3 bonds
B
5 bonds
C
2 bonds
D
4 bonds
Verified step by step guidance1
Write down the balanced chemical equation: \(2\ NO + O_2 \rightarrow 2\ NO_2\).
Identify the bonds present in the reactants. For nitric oxide (NO), there is one N=O bond per molecule, and for oxygen (O_2), there is one O=O double bond per molecule.
Calculate the total number of bonds broken per mole of reaction by considering the stoichiometric coefficients: 2 moles of NO and 1 mole of O_2.
Multiply the number of bonds in each molecule by the number of moles reacting: for NO, 2 molecules × 1 N=O bond each = 2 bonds; for O_2, 1 molecule × 1 O=O bond = 1 bond.
Add the bonds broken from all reactants to find the total bonds broken per mole of reaction: 2 (from NO) + 1 (from O_2) = 3 bonds.
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