Question

Calculate (i) the number of half-lives and (ii) the time required for the concentration of C2H6 to fall to one-sixteenth of its initial value as it dissociates into CH3 radicals at 973 K. (Rate constant k = 5.5x10-4s-1).

Answer 1

For first order reaction T=1260 sec

Time=5036 sec

Number of half-lives t/T=4