Following are two first order reaction with their half times given at `25^(@)C`.
`A overset(t_(1//2) = 30 min)rarr` Products
`B overset(t_(1//2)=40 min)rarr` Products
The temperature coefficients of their reactions rates are `3` and `2`, respectively, beween `25^(@)C` and `35^(@)C`. IF the above two resctions are carried out taking `0.4 M` of each reactant but at different temperatures: `25^(@)C` for the first order reaction and `35^(@)C` for the second order reaction, find the ratio of the concentrations of `A` and `B` after an hour.

Answer

2

Explanation

0.4M of `A overset(30 "min")(to) 0.2 M overset(30 "min")(to) 0.1 M ` (for A)
0.4 M of `B overset(20 "min")(to) 0.2M overset(20 "min") (to) 0.1 M overset(20 "min")(to) 0.05` (for B)
`"("(-d[B])/(dt)` will be doubled and hence `t_(1//2)` will be halved)
`therefore ([A])/([B]) = 2`