[填空题]
A 3.8-kg piece of al0u4(i+2ty sw( qqpm1v z;jh uxumnphp8b, bo;p8 r/wq y:inum at 30$^{\circ}\,C$ is placed in 1.0 kg of water in a Styrofoam container at room temperature (20$^{\circ}\,C$). Calculate the approximate net change in entropy of the system. $J/K$
