A sample containing 1.00 mol of an ideal gas at 300 K is subjected to the following sequence, all carried out isothermally:
Step 1: The gas is compressed from 6.00 L to 3.00 L.
Step 2: The same gas is then expanded from 3.00 L to 12.00 L.
Using R=8.314Jmol−1K−1, calculate the net entropy change ΔS (in J·K⁻¹) for the gas after both steps are completed.