[Taylor08]

The activation energy of an uncatalyzed reaction is 91 kJ/mol. The addition of a catalyst lowers the activation energy to 52 kJ/mol.

Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 34 degrees Celsius?

Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 112 degrees Celsius?

[MrTeo]

Your work? Seems quite an easy problem to me... you only need to apply Arrhenius equation