Which statement describes surface waves? They arrive before S waves. They travel faster than P waves. They are produced by P and S waves. They travel deep below Earth’s surface.

The answer is the magnetosphere.

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