A sample of ideal gas is taken from state 1 at pressure and volume to state 2 at…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A sample of ideal gas is taken from state 1 at pressure P0 and volume V0 to state 2 at pressure 0.50P0 and volume 2V0 along three different paths.
Path I: The gas expands isobarically at pressure P0 from V0 to 2V0, then the pressure instantaneously drops to 0.50P0 at constant volume.
Path II: The gas follows a straight-line segment on the P–V plane connecting the two states.
Path III: The gas expands isothermally along a smooth curve that lies entirely between Paths I and II on the P–V diagram.
Rank the magnitude of the work done BY the gas during the three paths.
(a) II > I > III
(b) I > II > III
(c) I > III > II
(d) III > II > I