describe the temrperature change that would occur in an exothermic enthalpy change, deltaH. why does this change occur based on the energies of the

describe the temrperature change that would occur in an exothermic enthalpy change, deltaH. why does this change occur based on the energies of the reactants and products? Is energy being released or absorbed in the reaction? what is the sign of the value for the exothermic enthalpy change, DeltaH.