At a certain temperature the half life periodsfor catalytic decomposition of nh3. What will be the pressure when the half life period is 2.5 hours
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Explanation:
(t
1/2
)
2
(t
1/2
)
1
=(
a
1
a
2
)
n−1
where, n is order of reaction
From the given data,
1.92
3.52
=(
6667
13333
)
n−1
(a∝ initial pressure)
=(2)
n−1
log
1.92
3.52
=(n−1)log2=0.3010×(n−1)
0.2632=0.3010×(n−1)
n=1.87≈2
Similar calculations are made between first and third observations, n comes equal to 1.908 (≈2).
Thus, the reaction is of second order.
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