a.) A certain reaction is second order in oxygen. By whatfactor will its rate in

Question

a.) A certain reaction is second order in oxygen. By whatfactor will its rate increase if the oxygen concentration isincreased by a factore of 2.72? b.) Consider the reaction 2NH3---->N2 + 3H2 . What is its rate ifthe NH3 concentration decreased from 0.400M to 0.160M in40 seconds? Thanks for your time I will rate lifesaver! a.) A certain reaction is second order in oxygen. By whatfactor will its rate increase if the oxygen concentration isincreased by a factore of 2.72? b.) Consider the reaction 2NH3---->N2 + 3H2 . What is its rate ifthe NH3 concentration decreased from 0.400M to 0.160M in40 seconds? Thanks for your time I will rate lifesaver!

Explanation / Answer

a)     Given that rate = k[O2]2         Now oxygenconcentration is increased by a factore of 2.72 ,          then rate   = k [ 2.72O2]2                            =7.4 k[O2]2         So rateincreases by 7.4 times of the initial rate. b)   Formula :                           1/[A] = kt + 1/ [A]0                       1/0.160  = k * 40 s + 1 / 0.4 M              (6.25 - 2.5)/M = k * 40 s                                  k  =  0.09375 L / mol .s                                                                1/0.160  = k * 40 s + 1 / 0.4 M              (6.25 - 2.5)/M = k * 40 s                                  k  =  0.09375 L / mol .s                                      

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