The complete combustion of hydrogen, H2(g), to form H2O(l) at constant pressure, releases 285.8 kJ of heat per mole of H2(g). -------- H2(g) + 1/2O2(g) ? H2O(l) • What is the enthalpy of the reaction? • Is this reaction exothermic or endothermic? • Draw an enthalpy diagram for the reaction. Make sure to properly label axis, location of reactants and products, sign of ?H, and flow of heat Please explain this question in detail to me because i am really lost Please do not answer if you are just going to answer the question if you are going to post a retarded answer on how i should learn thing ...because i am trying to learn how to do this and i have been trying to work it out all night. And my teacher made this an open class question not a homework question but i need to learn this for a test.