The decomposition of a compound is found to follow first order rate law. If it takes 15 minutes for `20%` of original meterial to react, calculate the rate constant.

The decomposition of a compound is found to follow first order rate la

1.	The decomposition of a compound is found to follow first order rate law. If it takes 15 minutes for `20%` of original meterial to react, calculate the rate constant.
Answer» Given `t=15 min., a=100` `a-x =100-20= 80` `k=(2.303)/(t)log ""(a)/(a-X)` `k=(2.303)/(15 )log ""(100)/(80) =0.1535 [2.000-1.9031]=0.1535xx0.0969` `k=0.0148 min^(-1).`

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The decomposition of a compound is found to follow first order rate law. If it takes 15 minutes for `20%` of original meterial to react, calculate the rate constant.

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