객관식
Given the following reaction mechanism:Step 1: NO_2 + F_2 → NO_2F + F (slow)Step 2: F + NO_2 → NO_2F (fast)Which elementary step in the proposed mechanism is the rate-limiting step?
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15. Chemical Kinetics
Rate Law
Multiple Choice
Which of the following would be a reasonable unit for the rate constant of a zero order reaction?
A
L mol^{-1} s^{-1}
B
mol L^{-1} s^{-1}
C
s^{-1}
D
mol^{-1} L s^{-1}
검증된 단계별 안내1
Recall the general rate law for a zero order reaction: \(\text{rate} = k\), where the rate is independent of the concentration of reactants.
Understand that the rate of reaction is typically expressed in units of concentration per time, such as \(\mathrm{mol\,L^{-1}\,s^{-1}}\).
Since the rate is equal to the rate constant \(k\) for a zero order reaction, the units of \(k\) must be the same as the units of the rate.
Therefore, the units of the rate constant \(k\) for a zero order reaction are \(\mathrm{mol\,L^{-1}\,s^{-1}}\).
Compare the given options to these units to identify the reasonable unit for the zero order rate constant.
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