Homework Answers
2N2O5(g)----------> 4NO2(g) + O2(g) K = 3.38*10-5 sec-1
t1/2 = 0.693/K
= 0.693/3.38*10-5
= 2.05*104 sec
K = 2.303/t log[P0]/[P]
3.38*10-5 = 2.303/50 log500/P
log500/P = 3.38*10-5 *50/2.303
log500/P = 0.000734
500/P = 100.000734
500/P = 1
P = 500torr
ii)
t = 20min = 20*60 = 1200sec
3.38*10-5 = 2.303/1200 log500/P
log500/P = 3.38*10-5 *1200/2.303
log500/P = 0.01761
500/P = 100.01761
500/P = 1.0414
P = 500/1.0414 = 480.13torr >>>answer
2N2O5(g)----------> 4NO2(g) + O2(g) K = 3.38*10-5 sec-1
t1/2 = 0.693/K
= 0.693/3.38*10-5
= 2.05*104 sec
K = 2.303/t log[P0]/[P]
3.38*10-5 = 2.303/50 log500/P
log500/P = 3.38*10-5 *50/2.303
log500/P = 0.000734
500/P = 100.000734
500/P = 1
P = 500torr
ii)
t = 20min = 20*60 = 1200sec
3.38*10-5 = 2.303/1200 log500/P
log500/P = 3.38*10-5 *1200/2.303
log500/P = 0.01761
500/P = 100.01761
500/P = 1.0414
P = 500/1.0414 = 480.13torr >>>answer
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