After world war ii, communist countries in eastern europe formed the a military alliance, and an economic alliance. a. marshall plan; the european recovery program b. north atlantic treaty; nato c. warsaw pact; comecon d. benelux union; the european community

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;

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