As you can see the amount of energy to take the molecules apart is smaller than the amount of energy that is released when you join them again into water. The amount of energy that is released is 484 KJ mol-1 for the total reaction. This means that there is 242 KJ mol-1 released for a single water molecule reaction.
Burning these elements together is an exothermic reaction.
To make it a bit more visual we make a animation you can see.