You are studying a system that has five evenly spaced energy levels. The lowest

Question

You are studying a system that has five evenly spaced energy levels. The lowest energy level (labeled "1") has an energy of 0.5 J. The remaining energy levels (labeled 2-5 in increasing energy) are evenly spaced, with 1 J energy spacing between the levels. There are three particles in the system, and any number of particles can occupy each of the energy levels. If the average energy per particle is 3.5 J, as in the four questions above, how can you increase the internal energy of the system without rearranging the particles in the system? Select one:

By doing work on the system

By adding heat to the system

By adding heat to and doing work on the system

By having the system do work on the surroundings and adding heat to the system

By doing work on the system and removing heat from the system

Explanation / Answer

The internal energy of a system is the total energy of a system which consists both the kinetic and potential energy. It is identified with disorder of a system. wo ways of internal energy of a system:

Both the methods result in the change in temperature. The change in the internal energy depends only on the initial and final states of the system. The work done and the amount of heat not only depend upon the initial and final states of the system, but also depend upon the path along which the changes occur.

Hence, answer is By adding heat to and doing work on the system

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