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← ScienceWhich mechanism slows methane combustion under sub-stoichiometric fuel ratios?
A)Radical chain termination enhancement✓
B)Increased activation energy barrier height
C)Fast forward reaction equilibrium shift
D)Decreased heat transfer coefficient forcing
💡 Explanation
Under fuel-rich conditions, excess fuel scavenges radicals, therefore radical chain termination enhancement reduces the overall reaction rate drastically slower, because the propagation steps are interrupted, rather than altering the inherent activation energy.
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