Thermodynamics

One mole of an ideal gas at 300 K in thermal contact with surroundings expands isothermally from 1.0 L to 2.0 L against a constant pressure of 3.0 atm. In this process, the change in entropy of surroundings(ΔSsurr) in JK−1 is
-(1 L atm = 101.3 J)