15Enthalpy Changes Energy Profiles CalorimetryEasy1 markWhich equation represents an endothermic reaction?ACH4(g) + 2O2(g) → CO2(g) + 2H2O(l)BCl2(g) → 2Cl(g)CH(g) + H(g) → H2(g)D2K(s) + 2H2O(l) → 2KOH(aq) + H2(g)Grade answerGrading criteria