To achieve ΔH 0 < 0, players may create such a reac on equa on in which the sum of enthalpies of forma on of products is more nega ve than that of reactants, i.e., exothermic reac on. To achieve ΔS 0 > 0, players may create such a reac on equa on, in which the sum of absolute entropies of products is more posi ve than that of reactants, i.e., a chemical system becomes more random when reactants are converted into products. In some cases, it might be not immediately obvious how to create a reac on equa on, in which ΔH 0 < 0 and ΔS 0 > 0. Adjustment of temperature might be a viable strategy. This aspect is discussed in detail in the sec on describing bonuses for adjustment of ΔG by hea ng or cooling.