An experimental gas chamber holds an ideal gas. The initial mean square speed of the gas molecules in the chamber is 2.7 × 105 m2 s-2.
During a venting phase, 40% of the gas molecules escape from the chamber. A pressure-regulation system adjusts the temperature of the remaining gas so that both the pressure and the volume of the gas inside the chamber remain constant.
What is the mean square speed of the gas molecules remaining in the chamber?
1.1×105 m2 s−21.1 \times 10^5\text{ m}^2\text{ s}^{-2}1.1×105 m2 s−2
1.6×105 m2 s−21.6 \times 10^5\text{ m}^2\text{ s}^{-2}1.6×105 m2 s−2
4.5×105 m2 s−24.5 \times 10^5\text{ m}^2\text{ s}^{-2}4.5×105 m2 s−2
6.8×105 m2 s−26.8 \times 10^5\text{ m}^2\text{ s}^{-2}6.8×105 m2 s−2
56 exam-style questions on OCR A A Level Physics Thermal physics, covering Temperature, Solid, liquid and gas, Thermal properties of materials, and Ideal gases. Each one has a worked solution and a mark scheme showing where the marks go.