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CBSE Class 12-science Answered

One-fourth of a first order reaction is completed in 32 min.What is the half life  period of this reaction ?
Asked by Pratik | 11 Oct, 2015, 01:41: AM
answered-by-expert Expert Answer
One space fourth space of space the space reaction space is space completed space means space 75 percent sign space reactant space is space left. For space the space first space order space reaction comma straight k equals fraction numerator 2.303 over denominator 32 end fraction log fraction numerator straight a over denominator 0.75 straight a end fraction space space equals space fraction numerator 2.303 over denominator 32 end fraction log 1.33 space space equals space space fraction numerator 2.303 over denominator 32 end fraction cross times 0.125 straight t subscript 1 divided by 2 end subscript space equals space fraction numerator 2.303 over denominator straight k end fraction log 2 space space space space space space space space equals space fraction numerator 2.303 cross times 32 cross times 0.301 over denominator 2.303 cross times 0.125 end fraction space space space space space space space space equals space 77.06 space min Thus comma space half space life space for space this space reaction space is space 77.06 space min.
Answered by Prachi Sawant | 11 Oct, 2015, 01:40: PM

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