Question

The kinetics of the rvaction between NO and H2 was fully studied First the order of the reaction with respect to I112] was determined using the inital rate method- Question 19 Second, the order of the reaction with respect ot [NOI was determined using the graphs of the integrated rate equations Question 20 Thied, a mechanism was peuposed, and must be validated -Question 21. Fourth, Write the rate law- Question 22 19) The fellowing data were oblained for [H21 when [NOI was held constant throughout the experiment 1.23-10-3 030 246-10-3 010 820 10-3 2.64 10-3 0.2) What is the order of the reaction with nespect to lH21. In other words, calculate the value of m. Show your work incleding units. No work, no Credit 20) Based on the following graphs, what is the under of the rvaction with respect to [NOP Explain. 05 tme,s time, s time, s

Answer 1

The given rates are The rate law for the reaction is Rate = k[H_2]^a [NO]^b Whrere a and b are the order of reaction w.r.to H_2 and NO respectively. since [NO] = constant,so rate = k[H_2]^a From.1: 1.23*10^-3 = k(0.15)^a equation 1 From.2: 2.46*10^-3 = k(0.30)^a equation 2 Divide eq.2 with eq.1 2.46 times 10^-3/1.23 times 10^-3 = k(0.30)^a/k(0.15)^a 2 = (2)^a 2' = (2)^a a = 1 Order of the reaction with respect to H_2 is = a = 1 \r\n The integrated rate laws are For Zero order reaction, [A] = -kt + [A]_ compositefunction For first order reaction, ln[A] = -kt + ln[A]_ compositefunction for second erder reaction, 1/[A] = kt + 1/[A]_ compositefunction That is we will get a straight line if we plot For zero order reaction: [A] vs time For first order reaction: ln[A] vs time For second order reaction: 1/[A] vs time From the given data, a straight line is obtained by plotting 1/[NO] vs time