Question

Internal energy definition in thermodynamics

Answer 1

It is the sum of energies possessed by a body due to its structure,shape and movement. Some of these include potential,kinetic,rotational etc energies.
Hope it helps.

Answer 2

Internal energy of a system is defined as the sum of different energies associated with its atoms and molecules like Potential energy, Kinetic energy (due to translatory, rotatory and vibratory motion), electronic energy, nuclear energy etc.

Some Related Information:-

• 1. Internal energy is an extensive property.

• 2. We can never find out thee absolute value of internal energy (E) of system.

• 3. We can only calculate the change m internal energy of the system (AE) by using an instrument which is called as Bomb calorimeter. n bomo calonnerer reactions are carried out at constant volume.

• 4. Internal energy is a state function.