A Glimpse of Transport Phenomena

The latter ensures that among all possible final states, there will be a preferential path that an isolated system will follow toward that end state that ensures the maximum increase in the value of entropy. There is a tendency to achieve homogeneity in a system, which is the most likely state in which it can exist. In Fig. 6.13, if we remove the wall separating both compartments, then the gas, naturally, will tend to homogenize in the whole container. 

Just as the energy balance is different from the material balance because energy balance includes terms that are not related to mass exchange, in the same way, the entropy balance is different from material and energy balances because entropy includes a term that takes into account entropy generation (5 gen)- 

The study of transport phenomena follows the study of thermodynamics. Thermodynamics analyzes systems that are in a state of equilibrium. On the other hand, transport phenomena study systems that have shifted from an equilibrium state and attempt to quantify the flow properties of the system (e.g., energy, concentration of species) that arise to guide the system to return to its equilibrium state. 

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