The reaction `A rarr B` has `Delta H = -10 kcal` and `E_a = 30 kcal`. Find `Ea^1` for the reverse reaction.

An endothermic reaction A rarr B have an activation energy 15 kcal//mol and the heat of the reaction is 5 kcal//mol . The activation energy of the reaction B rarr A is :

In gaseous reactions important for-the understanding of the upper atmosphere H_2O and O react bimolecularly to form two OH radicals. DeltaH for this reaction is 72 kJ at 500 K and E_a is 77 kJ mol^-1 , then E_b for the bimolecular recombination of two OH radicals to form H_2O and O is::

The reaction L rarr M is started with 10 g of L . After 30 and 90 minute, 5 g and 1.25g of L are left respectively. The order of reaction.is:

For a reversible reaction the rate constant for the forward reaction is 2.38xx10^(-4) and for the backward reaction is 8.15xx10^(-5) The k_c of the reaction is: