Entropy

The volume of a sample of

He (g)

is increased from

1.0 L

2.0 L

at constant temperature, as shown in the diagram below.

How does the entropy of the $He (g)$ ‍ sample at $2.0 L$ ‍ compare to its value at $1.0 L$ ‍?

(Choice A)
The entropy is lower since the $He (g)$ ‍ atoms collide with each other less frequently.
(Choice B)
The entropy is higher since the $He (g)$ ‍ atoms are distributed within a larger space.
(Choice C)
The entropy is the same since the number of moles of $He (g)$ ‍ is constant.
(Choice D)
The entropy is the same since the average kinetic energy of the $He (g)$ ‍ atoms is constant.

AP®︎/College Chemistry