CHY 103 Lecture Notes - Lecture 9: Heat Capacity, Joule, Jmol
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If we consider that h final in our system represents the products and h initial corresponds to the reactants then we can write the following: Since the above equation represents the enthalpy change for a chemical reaction we sometimes signify it by hrxn (or simply h) and include it with the balanced equation. 2h2(g) + o2(g) 2 h2o (g) hrxn = - 483. 6 kj. Note: it is understood that the equation as written produces this h. We will see later that if the coefficients change the h would change also. The enthalpy change for a reaction can be represented by an _____________________. Enthalpy is an _____________, meaning that the magnitude of h is directly proportional to the amount of reactant consumed in the process. The enthalpy change for a reaction is equal in magnitude _____________ in sign to h for the reverse reaction. The enthalpy change for a reaction depends on the state of the reactants and products.
