What are the main human features of

The stadium,statue of christ, church of sanfrancisco

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

The peak above is part of the  sierra madre occidentals ,  a chain of volcanic mountains that runs through the middle of central america.