Question
number 8
7. At 50 C, cyclopropane (caH) rearranges to propene (CH,CH CHa) The reaction is frst order and the rate constant is 67 x 10 sec If the initial concentration of cyclopropane is o 0050 M, what is the molanty of the cyclopropane after 30 minutes? [4 pts) 8. data table shows the variation of No, concentration with time for the decompositon of Nao, according to the equation 2Nzos(g) 4NOa(g) odg Time(sec) [N,ol (M) In [Naoil 091 0 75 600 3000 76 Complete the blank column and plot a graph of In Noversus time and use your graph to determine the rate constant of the reaction. Use real graph paper for your graph) 16 ptsl 9. A sample of HI (9,30 x 103 mo) was placed in a 2 00 L at 1000K After equilibrium was reached the concentration of was 6 29 x 10 M. Calculate the value of Kc at 1000 K for the reaction 16 pts) Hag) Iz(g)
Explanation / Answer
slope=-K=Ln[N2O5]3000 -Ln[N2O5]0/3000-0=-1.83258-(-0.09431)/3000s=-5.794x10^-4s^-1
rate constant,K=5.794x10^-4s^-1
Time [N2O5] ln[N2O5] 0 0.91 -0.09431 300 0.75 -0.28768 600 0.64 -0.44629 1200 0.44 -0.82098 3000 0.16 -1.83258
