Question

What do you mean by internal energy?

Answer 1

Internal energy:

1. The internal energy of an ideal gas is a good approximation of a real-world system. In such as system, the particles in an ideal gas are considered to be point objects that have completely elastic collisions with each other.
2. It is a large quantity that varies depending on the complexity of the organization or the quantity of stuff it comprises.
3. The $\mathrm{joule}$ is the SI unit of internal energy ($\mathrm{J}$).