$2$ attempts left

Which value $($if any$)$ corresponds to a faster reaction? Select the single best answer.

$H^0=6k\frac{J}{m}ol$ or $H^0=-6k\frac{J}{m}ol$

$6k\frac{J}{m}ol$

$-6k\frac{J}{m}ol$

Neither value corresponds to a faster reaction.