Is the principal concern in the study of thermodynamics the ?amount of internal energy in a system or the ?changes? in internal energy in a substance?
Solution 8RQ Step 1: Internal energy, ‘U’ is the energy contained within the system if there is no external influence. We cannot measure the absolute internal energy of a system directly and it is complex. Internal energy is the totality of kinetic energy and potential energy of the particles in a system.