There are two important isotopes of uranium— 235U and 238U ; these isotopes are nearly identical chemically but have different atomic masses. Only 235U is very useful in nuclear reactors. One of the techniques for separating them (gas diffusion) is based on the different average velocitiesvrms of uranium hexafluoride gas, UF6 . (a) The molecular masses for 235U UF6 and 238U UF6 are 349.0 g/moland 352.0 g/mol, respectively. What is the ratio of their average velocities? (b) At what temperature would their average velocities differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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There are two important isotopes of uranium— ²³⁵U and ²³⁸U ; these isotopes are nearly identical chemically but have different atomic masses. Only ²³⁵U is very useful in nuclear reactors. One of the techniques for separating them (gas diffusion) is based on the different average velocities
v_rms of uranium hexafluoride gas, UF₆ . (a) The molecular masses for ²³⁵U UF₆ and ²³⁸U UF₆ are 349.0 g/mol
and 352.0 g/mol, respectively. What is the ratio of their average velocities? (b) At what temperature would their average velocities differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?

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