# How can the ionization of water be represented?

$2 {H}_{2} O r i g h t \le f t h a r p \infty n s {H}_{3} {O}^{+} + O {H}^{-}$
This is another equilibrium reaction; and is most commonly quoted for a temperature of $298$ $K$.
At this temperature, ${K}_{a}$ $=$ $\left[{H}_{3} {O}^{+}\right] \left[O {H}^{-}\right]$ $=$ ${10}^{- 14}$. Would you expect ${K}_{a}$ to increase or decrease at temperatures $>$ $298 K$? Why or why not?