Question

In a catalytic decomposition of NH3 when intial preesure of ammonia was 100 ml of Hg its half life was 4hr & when its initial pressure was 200 ml of Hg half life was 2hr
then find order of reaction?
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Answer 1

Answer:

Explanation:

Half life period of a reaction is indirectly proportional to the initial concentration.

∝ 1 /

For first scenario, Half life = 4 years; Concentration = 50mm

4 = 1/

For second scenario, Half life = 2 years; Concentration = 100mm

2 = 1/

Ratio will be:

4/2 =

2=

Therefore, n = 2

Order of reaction is 2.

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