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Question

The rate constant of the reaction AB is k=0.5; the initial concentration of A being 1 mol/litre. Calculate the degree of conversion of substance 'A' within 1 hour if the reaction is of zeroth, first and second order. How does the degree of conversion depend on the order of reaction?

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Solution

Zero order:
x=kt
x=0.5×1=0.5
First order: k=2.303tlog10aax
k=0.5; t=1 hr; a=1 M
0.5=2.3031log101(1x)
x=0.39
Second order: k=1txa(ax)
0.5=11x1(1x)
x=0.33

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