1) Why is the standard of enthalpy of formation of H2(s) not zero? 2)What volume of a 6.00 M KOH solution must be diluted to 200mL to make a 1.50 M solution of KOH? 3)The value of Delta H for the reaction is -126kJ. The amount of heat that is released by the reaction of 25g of Na2O2 with water is ____kJ. 2Na2O2(s) + 2H2O(l) ---> 4NaOH(s) + O2(g) It is a shot in the dark, but there are some smart people on here. I need to know how to do these calculations for the quiz on Monday. Thanks for the help.