Which statement describes characteristics of an endothermic reaction ?

1. The sign of H is positive, and the products have less potential energy than the reactants.

2. The sign of H is positive, and the products have more potential energy than the reactants.

3. The sign of H is negative, and the products have less potential energy than the reactants.

4. The sign of H is negative, and the products have more potential energy than the reactants.