Question

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

Answer 1

Answer: (C)

Remain same

Answer 2

This is the case of free expansion of gas. In free expansion $\Delta U = 0$⇒ Temp. remains same.