Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

Chemical engineering thermodynamics is more concerned with the equilibrium states behavior. How much energy or mass is present at equilibrium like what is the equilibrium concentration, temperature etc. or we can say by basic thermodynamics the amount of energy transferred from one form to another by the use of first law of thermodynamics.
But, basically the chemical engineering thermodynamics deals with equilibrium states.