An ideal gas is compressed isothermally at 300 K so that its pressure increases from…
CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics
Problem
An ideal gas is compressed isothermally at 300 K so that its pressure increases from 1.0 atm to 4.0 atm. Which statement about the entropy change of the gas is most consistent with this process?
(a) ΔS is positive because ΔS=nRln(P1P2) and P2>P1.
(b) ΔS is positive because a higher pressure implies more energetic molecular collisions.
(c) ΔS is negative because the decrease in volume restricts the dispersal of the gas molecules.
(d) ΔS is zero because entropy depends only on temperature for an ideal gas.