If 1.28 mol of He gas is added holding the volume and temperature constant, the average kinetic energy of the total system will:

1. decrease
2. remain the same
3. increase
4. not enough information to answer the question

2. A 1.28 mol sample of Ar gas is confined in a 31.5 liter container at 26.5 C.

If 1.28 mol of He gas is added holding the volume and temperature constant, the average kinetic energy of the total system will:

2. remain the same