1 mol NO = 14 + 16 = 30 grams.
4 mol NO = 120 g
17.7 kJ are released for 120 g NO so how much will be released for 1 g? That's
17.7 kJ x (1/120) = ? kJ. Released kJ means an exothermic reaction and that makes the dH = a negative number.
How many kJ of energy are released when 2 moles of NO reacts with an excess of ozone O3? How many kJ of energy are released when 44.9 g of NO react with an excess of ozone O3? What is the ΔH for the reverse reaction?
How much heat is absorbed/released when 35.00 g of NH3(g) reacts in the presence of excess O2(g) to produce NO(g) and H2O(l) according to the following chemical equation? 4NH3(g)+5O2(g)--->4NO(g)+6H2O(l) DeltaH=1168kj