PhysicsAdvancedHigh School (11–12)Heat & Thermodynamics › Kinetic Theory of GasesJEE AdvancedOlympiad
Created by StemPy LabHelium in a vessel at leaks into a vacuum through a pinhole so small that the atoms leave one by one, without colliding near the hole. Take . What is the average kinetic energy of the atoms that leave?
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← Take a still atmosphere of helium and nitrogen, mixed but each acting as an ideal gas on its own, at a uniform 250 K, with g = 9.8 m/s² at every height. The molar masses are 4.0 × 10⁻³ kg/mol and 2.8 × 10⁻² kg/mol, and R = 8.314 J/(mol K). The ratio of the number of helium atoms to nitrogen molecules per unit volume is measured at the ground and at a height of 10 km. How does the ratio at that height compare with the ratio at the ground?Equal masses of helium and oxygen are mixed in a closed vessel at 300 K. Treat both as ideal gases, oxygen as rigid diatomic, with molar masses 4 g/mol and 32 g/mol. Which of the following statements are correct? →
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