6. In the Soviet Union, most industry centered on what products? A. wines and spirits B. consumer goods C. automobiles for export D. military hardware and industrial machinery

The answer for the question your on is D : )

How am i supposed to know your lecture

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