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4.32 numerical plz
Asked by lovemaan5500 | 18 Sep, 2019, 10:02: PM
50% of reaction gets completed in 2 hr. that is, half life period of reaction is 2 hr.

Next half reaction gets completed in 2hr that is (25% half of reamaining 50%) half life period is 2 hr.

So the half life period of reaction is independent of concentration. Hence it is first order reaction.

Also, we can solve this by using equations for first order reaction,

We have,

We know,

t1/2 = 2 hr

k = 0.3465 hr−1

By using expression for first order reaction,

t = 4 hr

A = 100

(A-X) = 100- 75

= 25

By using expressions for first order reaction, we get same value of rate constant.

Hence it is confirmed that, it is a first order reaction.
Answered by Varsha | 19 Sep, 2019, 01:12: PM

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