The table shows the thermodynamic data for a reaction.

thermodynamic data
energy of the reactants energy of the products activation energy
−420 kj −240 kj −310 kj

which of the following statements explains if the reaction is endothermic or exothermic?
the change in enthalpy is +180 kj, so it is an endothermic reaction.
the change in enthalpy is −180 kj, so it is an exothermic reaction.
the activation energy is lower than the change in enthalpy, so it is an exothermic reaction.
the activation energy is higher than the change in enthalpy, so it is an endothermic reaction.