What is the heat of reaction for KNO3 (potassium nitrate)?
since there is no information on the internet as to what the heat of reaction for the formation of potassium nitrate is, we will have to determine it through the accurate method of bond energies here’s the science behind it all when a reaction occurs, there is always heat loss or heat gain, which means that the products will either have more or less energy than the reactants that we started with in this case KOH + HNO3 = H2O + KNO3 potassium hydroxide plus nitric acid yields water plus potassium nitrate it takes a certain amount of energy to break the bonds of the reactants, and it also takes another certain amount of energy to unite the bonds of the products, and so we can determine these two energy amounts by using the bond energies reactants: K – O = 219 kJ O – H = 366 kJ H – N = 391 kJ N – O = 155 kJ X 3 = 465 kJ total = 1441 kJ products: H – O = 366 kJ X 2 = 732 kJ K – N = 189 kJ N – O = 155 kJ X 3 = 465 kJ total = 1386 kJ change in energy (enthalpy) = heat of reaction = energy (p
