The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the r

Question

The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction. The reaction is first order and has a rate constant of 4.82 X 10^-3x^-1 at 64 degree C. If the reaction is initiated with 0.072 mol in a 1.00-L vessel, how many moles remain after 151 x? 13) The following reaction is first order , C2H6 2 CH3. If the rate constant is equal to 5.5 X 10^-4 s^-1 at 1000 K, how long will it take for 0.35 mol C2H6 in a 1.00 L. container to decrease to 0.20 mol in the same container? Isomerization of methylisonitrile: CH3NC(g) CH3CN(g) Order in CH3NC. The half life of the reaction is 5.20 X 10^1s at 545 K. The rate constant CH3NC] is 0.030 M is s^-1.

Explanation / Answer

Q12)         k=4.82*10-3 s-1

       C0 =.072 M

t=[2.303log(C0/C)]/k

putting values;

C=0.035 moles/litre

ans=B

Q13)     k=5.5*10-4 s-1

C0 =0.35 M

C=0.2 M

t=[2.303log(C0/C)]/k

putting values

t=17 mins;

ans=C

Q14)   t1/2 =52 secs

since, k =ln2/ t1/2;

k=.0133 s-1

ans=A

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