JEE Advanced 2020 Concept Recapitulation Test 4 Paper 1

One mole of an ideal gas is expanded isothermally at 298K until its volume is tripled. Find the value of ∆Sm (entropy of system) if the expansion is a free expansion (in vacuum). Given (log3= 0.477R=8.3JK−1mol−1 ). Give your answer in JK−1 upto two decimals only.