Question

N2(g,10 atm) -> N2(g,1atm)

Answer 1

The only way to change the pressure of a gas from a high to a lower pressure, without reducing temperature or

removing gas atoms/molecules, is to increase the volume.

In doing so, the gas molecules have a larger space to move and hence there is greater randomness or disorder.

Answer: ∆S is positive; the gas expands into a larger volume