The internal energy `(U)` of a themodynamic system includes
(i) kinetic energies of the molecules
energies of attraction among subsatomic particles (atoms, ions or molecules)
(iii) energies of repulsion
(iv) other forms of energy

Options

A. (i),(ii),(iii),(iv)
B. (ii),(iii)
C. (i),(ii),(iii)
D. (iv)

Answer

A

Explanation

The internal energy of a system it the sum of the various kineticf and potential energy contributions Kinetic energy contribution includes translational kinetic energy, rotational kinetic energy, and vibrational kinetic energy. Potential energy contribtion includes energy due to (a) intermolecular interaction, (b) interatomic interaction. (c ) Coulombic interaction between electrons. (d) Coulombic interaction between electrons and nucleus, and nuclesus, and (e) Coulombic interaction between nucleon.s