Question

The absolute value of internal energy of a substance cannot be determined.If true enter 1 else o

• A. 1

Answer 1

The correct option is A 1
The energy associated with the disordered, random motion of molecules is called Internal Energy. It is separated in scale from the macroscopic ordered energy associated with moving objects; it refers to the invisible microscopic energy on the atomic and molecular scale. Internal energy is independent of the path.
Internal energy is a state property i.e. its value depends only upon the state of the substance but does not depend upon how that state is achieved. The absolute value of internal energy of a substance cannot be determined. However determining the absolute values of internal energies is neither necessary nor required. It is the change in internal energy accompanying a chemical or a physical process that is of interest and this is a measurable quantity.