In a thermodynamic system where the working substance is an ideal gas,its internal energy is in the form of:

What are macroscopic quantities and microscopic quantities?

How is the behavior of gases explained?

State whether the following statements are True or False:
$(i)$ Attractive or repulsive forces act between molecules of an ideal gas.
$(ii)$ The potential energy of an ideal gas is zero.
$(iii)$ Molecules of all gases are the same in size.
$(iv)$ Molecules of an ideal gas are perfectly elastic spheres.

In a thermodynamic system,the working substance is an ideal gas. Its internal energy is in the form of

What is an ideal gas?