• # question_answer A thermally insulated container is divided into two parts by a screen. In one part the pressure and temperature are P and T for an ideal gas filled. In the second part it is vacuum. If now a small hole is created in the screen, then the temperature of the gas will A) Decrease B) Increase C) Remain same     D) None of the above

[c] This is the case of free expansion of gas. In free expansion $\Delta U=0$Þ Temp. remains same.