n For the reaction 2A+B +2C D+E the following initial rate data were collected a
ID: 714290 • Letter: N
Question
n For the reaction 2A+B +2C D+E the following initial rate data were collected at constant rate law for this reaction. All units are arbitrary temperature. Determine the corre Trial [A) B) Rate 10.225 1 0.320 0.250 0.600 0.225 0.150 0.350 0.350 0.150 0.0217 0.0439 2 0.320 0.150 0350 0.0362 4 0.225 0.150 A) Rate = k[A]2[B)[CH B) Rate = k[A][BJ2[C]-I C) Rate K[AJ[B]IC] D) Rate HIAI [B]IC] Q None of these choices are correct. B) Sulfuryl chloride, SO Cl2(g), decomposes at high temperature to form S02) and Cl2(8). The rate constant at a certain temperature is 4.68 x 10-5s-1. What is the order of the reaction? A) Zero B) First c) Second D) Third More information is needed to determine the order. 9) Which of the following sets of units could be appropriate for a zero-order rate constant? 9) A) L3 mol-3s-1 B) mol L-is-1 C) L mol-is-1 D) s-1 10) Which one of the following sets of units is appropriate for a second-order rate constant? 10) A) mol2 L-2s-I B) L mol-1s-1 C) s-1 D) mol Ls-1 E) L2 mol 2s 1Explanation / Answer
7) ANS::
Comparing Trial 1 & 3, Rate increases by 1.66 times when [B] increases 1.66 times while [A] & [C] remain const.
Hence Rate proportional to [B].
Comparing Trials 1 & 4, Rate is multiplied by 0.58 when [C] is multiplied by 1.71 = 1/0.58 while [A] & [B] remain const.
Hence Rate proportional to [C]^-1.
Finally, Comparing 1 & 4, Rate is multiplied by 2.02 when [A] is multiplied by 1.42 = sqrt(2.02) while [B] & [C] remain const.
Hence, rate proportional to [A]^2.
Hence rate equation is Rate = k[A]^2[B][C]^-1..
Answer is C
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