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Date: 15-1-2017
102
Date: 28-9-2018
211
Date: 15-1-2017
102
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Reversible or Opposing Reactions
In reversible or opposing reactions the products formed also react to give back the reactants.
Initially, the rate of forward reaction is very large which decreases with passage of time and the rate of backward or reverse reaction is zero which increases with passage of item. A stage is reached when two rates become equal. This situation is called the chemical equilibrium. It is dynamic in nature i.e., all the species are reaching at the rate at which they are being formed. A reaction of this type may be represented as
where kf and kb are the rate constants of the forward and backward reactions respectively.
The overall rate of reaction is given by
Rate of Reaction = Rate of forward reaction – Rate of backward reaction
Substituting the value of kb in equation (ii), we get
From this equation we can find the value of kf from the quantities [A]0, xeq and x at time t. All these quantities can be measured easily. From the value of kf the value of kb can be calculated by using the relation.
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مخاطر خفية لمكون شائع في مشروبات الطاقة والمكملات الغذائية
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"آبل" تشغّل نظامها الجديد للذكاء الاصطناعي على أجهزتها
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تستخدم لأول مرة... مستشفى الإمام زين العابدين (ع) التابع للعتبة الحسينية يعتمد تقنيات حديثة في تثبيت الكسور المعقدة
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