Why do most companies sell shares of stock

Most companies sell shares of stocks because it is a quick way to raise necessary funds to make new business ventures, without losing the material assets they have and maintaining a fair amount of security in their business framework. It also spreads word about their business amongst big investors.

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen