Basic Thermodynamic Functions and Applications

When a reaction occurs, there is an energy change in going from the reactants to the products this energy change is termed the heat of reaction. To measure the total heat or energy emitted or consumed by a reaction, we use a thermodynamic function 

CURRENT AND FUTURE STATE OF ENERGY PRODUCTION AND CONSUMPTION 

If we define the reactant and the product with a common standard state, then the energy change associated with this process is the difference between the enthalpy of the product and the enthalpy of the reactant. This is defined as the heat of reaction, AH, with A symbohzing a change in energy between the enthalpy of the products and the enthalpy of the reactants. According to the energy balance then. 

We can extend this to a situation in which the reaction is somewhat more complex, involving multiple reactants and products, each produced with different stoichiometric 

We can pnt this definition on a molar basis, by dividing by the number of moles, 

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