Thermodynamics mainly deals with:

Options

A. interrelation of various forms of enrgy and their transformation from one form to another.
B. energy changes in the processes which depend only on initial and final states of the microscopic systems containing a few molecules.
C. how and at what rate these energy transformations are carried out.
D. the system in equilibrium state or moving from one equilibrium state to another equilibrium state.

Answer

A, D