(a) For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.
(b) Rate constant 'k' of a reaction varies with temperature 'T' according to the equation :
log k = log A -
where Ea is the activation energy. When a graph is plotted for log k vs., a straight line wih a slope of -4250 K is obtained. Calculate 'Ea ' for the reaction.(R = 8.314 JK-1 mol-1 )
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