. For a first order reaction
X + 2Y.. +Z), the initial pressure was found to
be 400 mm which changed to 1000 mm after 20
min. The rate constant for the reaction will be :
(1) 6.93 min-1
(2) 0.693 min-1
(3) 0.0693 min-1
(4) 0.00693 min
Answers
Answered by
0
Answer:
Correct option is
B
rate constant is 0.0693 min
−1
A⇌2B+C
P O O ; t=0
P−P
O
2P
O
P
O
; t=20
Initial P
T
=400mm; Final P
T
=1000mm
⇒P−P
O
+2P
O
+P
O
=P
T
⇒P+2P
O
=P
T
⇒400+2P
O
=1000
⇒P
O
=
2
600
=300mm
⇒P−P
O
=400−300
=100mm of Hg
K=
t
2.303
log(
P
t
P
1
)
⇒K=
20
2.303
log
100
400
=0.0693min
−1
⇒t
1/2
=
K
0.693
=
0.0693
0.693
=10 min .
Explanation:
I hope this is are write ans
Similar questions