Q. 334.5( 2 Votes )
State a condition under which a bimolecular reaction is kinetically first order reaction.
Answer :
A condition under which the order of a chemical reaction can be altered is by taking the solvent or the reactant in the excess amount due to which its concentration does not change much.
For example,
CH3COOCH3 + H20 ⇌ CH3COOH + CH3OH
Initially, rate is given by,
Rate= k’ [CH3COOH] [H2O]
When we add an excess of solvent then,
Rate= k[CH3COOCH3]
Here k= k’[H2O]
This is also known as pseudo first-order reaction.
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A first order reaction is 50% completed in 40 minutes at 300 K and in 20 minutes at 320 K. Calculate the activation energy of the reaction.
(Given: log 2 = 0.3010, log 4 = 0.6021, R = 8.314 JK–1 mol–1)
Chemistry - Board PapersThe value of rate constant of a pseudo first order reaction ____________.
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