anonymous
  • anonymous
If rate constant for a 1st order reaction is k, then T1/4 can be written as: 0.29/k. I know, that k=0.693/T1/2, where k=> rate const. and T1/2=> half life. T1/4 is twice half-life. How do you get the given answer?i.e 0.29/k.
Physics
schrodinger
  • schrodinger
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anonymous
  • anonymous
T (1/4) = [ln (1/(1-0.25))] /k = ln (4/3) x 1/k = 0.285/k
anonymous
  • anonymous
How can i use T1/2 = 0.693/k, without using logs.
anonymous
  • anonymous
uve got to use logs even if u break it up like [ln 4 - ln 3]/k = 2(ln2)/k -(ln3)/k the first term u cn use t1/2 but uve gotta use logs for the second term

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