For the decomposition of dinitrogen pentoxide in carbon tetrachloride solution a
ID: 811168 • Letter: F
Question
For the decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 C the average rate of disappearance of N2O5 over the time period from t = 0 min to t = 159 min is found to be 2.79E-3 M min-1. The average rate of formation of O2 over the same time period is________________ M min- For the gas phase decomposition of hydrogen iodide at 700 K the average rate of disappearance of HI over the time period from t = 0 s to t = 1162 s is found to be 1.39E-3 M s-1. The average rate of formation of H2 over the same time period is __________________ M s-1.Explanation / Answer
A) rate= -1/2 d[N2O5]/dt = d[O2]/dt
The average rate of formation of O2 = d[O2]/dt =-1/2 d[N2O5]/dt
= (1/2) x2.79 x10^-3
=1.395 E-3 M min-1
B) rate= -1/2 d[HI]/dt = d[H2]/dt
The average rate of formation of H2 = d[H2]/dt = -1/2 d[HI]/dt
= (1/2) x 1.39E-3
=0.696E-3 M s-1