Question

It is difficult to calculate U, however∆U can be easily determined,. Why? Explain giving an example.

Answer 1

Answer:

it is difficult to calculate absolute value of internal energy of a system because it in was many kinds of energy like electrostatic potential energy kinetic energy rotational energy magnetic field energy and many more and to get this value accurately it is very difficult and almost impossible therefore it took change in internal energy because it depends on the heat given to the system and work done on the system or by the system which is known in an experiment