(a) Explain the following terms: (i) Rate of a reaction. (ii) Activation energy of a reaction. (b)The decomposition of phosphine, `PH_(3)` proceeds according to the following equation: Rate `=k[PH_(3)]` The half-life of `PH_(3)` is 37.9 s at `120^(@)C`. (i) How much time is required for `3//4th` of `PH_(3)` to decompose? (ii) What fraction of the original sample of `PH_(3)` remains behind after 1 minute?
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The correct Answer is:
(i) 75.83s, (ii) 0.3342
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Decomposition of phosphine (PH_(3)) at 120^(@) C proceeds according to the equation 4PH_(3)(g) to P_(4)(g) + 6H_(2)(g) It was found that the reactioin follows the rate equation, Rate = k[PH_(3)] The half life period of PH_(3) is 37.9 s at 120^(@) C. i) How much time will be required for 3//4 of PH_(3) to decompose? ltrbgt ii) What function of the original amount of PH_(3) will remain undecomposed after 1 minute?
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