ΔHfo stands for <span>standard heat of formation for a compound.
Heat of formation of compound is mathematically expressed as, </span>∑Hproducts - ∑Hreactants <span> If value of </span>ΔHfo is negative, it suggest that is exothermic reaction. If ΔHfo is positive, it suggest that it is endothermic reaction. <span>
For example, a population living in a cold climate and wears little to no clothes will give them frost bite. And so the nature of needing to adapt is core to survival.
