Fernandez-Torres, Maria J. How to do an energy balance in the PRESENCE of chemical reaction - Part 1 URI: http://vertice.cpd.ua.es/62465 DOI: ISSN: Abstract: A solved example for the determination of the increment in enthalpy for the energy balances for open systems in the context of chemical engineering is presented. The example shows how to tackle this kind of problems when it has been decided not to make use of the enthalpy of the reaction. The substances elements will be used as reference state. Keywords:Chemical reaction, Energy balance, Enthalpy, Enthalpy of formation, Enthalpy of reaction, Open systems, Chemical engineering, Introduction to chemical engineering video