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:

A: By doing work on the system

B: By adding heat to the system

C: By adding heat to and doing work on the system

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

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

Explanation / Answer

C: by adding heat to and doing work on the system

- If a work is done on the system, it is added to the system's internal energy.

- If heat is supplied to the system by heating it, the heat supplied is added to its internal energy.

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