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Consider a system consisting of a cylinder with a movable piston containing 10^6 gas molecules at 298K at a volume of 1L. Consider the following descriptions of this system:

1. Initial system

2. Starting from the initial system, the volume of the container is changed to 2L and the temperature to 395K.

3. Starting from the initial system, a combination reaction occurs at constant volume and temperature.

4. Starting from the initial system, the gas reacts completely to produce 10^7 gas molecules at 395K in a volume of 2L.

5. Starting from the initial system, the temperature is changed to 395K at constant volume.

Arrange the descriptions in order of increasing number of microstates in the resulting system.