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While studying the decomposition of gaseous n2o5 it's observed that a plot of logarithm of its partial pressure versus time is linear . What kinetic parameters can be obtained from this observation?
 

Asked by rbhatt16 16th October 2017, 4:23 PM
Answered by Expert
Answer:
Assume the rate expression for 1st order reaction 
space space space space space space space space space K t space equals space 2.303 space log space open square brackets fraction numerator a over denominator left parenthesis a minus X right parenthesis end fraction close square brackets
space space o r
space space space space space space space space K t space equals space 2.303 space log space a space minus space 2.303 space log space left parenthesis a minus X right parenthesis......... left parenthesis i right parenthesis

space E q. left parenthesis i right parenthesis space m a y space b e space w r i t t e n space i n space t e r m s space o f space p r e s s u r e space a s
space space space space space space space K t space equals space 2.303 space log space P subscript 0 subscript blank end subscript space minus space 2.303 space log space P
o r
space space space space space space space log space P space equals space fraction numerator negative K t over denominator 2.303 end fraction space plus space log space P subscript 0
i.e., log P vs time graph is linear if reaction is 1st order. the given data also suggest for linear curves in log P vs time and thus reaction obeys 1st order.
Answered by Expert 17th October 2017, 6:11 PM
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