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27/01/2022 4:53 pm
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Calculate the half-life of a first order reaction from their rate constants given below:
(i) 200 s-1 (ii) 2 min-1 (iii) 4 years-1
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27/01/2022 4:57 pm
(i) Half life, t1/2 = \(\frac{0.693}{k}\)
= \(\frac{0.693}{200\; s^{-1}}\)
= 3.47 ×10-3 s (approximately)
(ii) Half life, t1/2 = \(\frac{0.693}{k}\)
= \(\frac{0.693}{2\; min^{-1}}\)
= 0.35 min (approximately)
(iii) Half life, t1/2 = \(\frac{0.693}{k}\)
= \(\frac{0.693}{400\; years^{-1}}\)
= 0.173 years (approximately)