Uranium has two common isotopes, with atomic masses of 238 and 235. one way to separate these isotopes is to combine the uranium with fluorine to make uranium hexafluoride gas, UF6, then exploit the difference in the average thermal speeds of molecules containing the different isotopes. Calculate the rms speed of each molecule at room temperature, and compare them.
Speed of the lighter isotope of UF6 is more than the speed of heavier isotope of UF6
Atomic mass of UF6 is calculated as,
The mass of each UF6 atom is calculated as,
The rms speed of a molecule is given by,
Where K = Boltzman constant & T is absolute temperature = 300k
Thus UF6 of U235 isotope is faster than the UF6 of U238 isotope.
Put a few spoonfuls of water into a bottle with a tight lid. Make sure everything is at room temperature, measuring the temperature of the water with a thermometer to make sure. Now close the bottle and shake it as hard as you can for several minutes. When you're exhausted and ready to drop, shake it for several minutes more. Then measure the temperature again. Make a rough calculation of the expected temperature change, and compare.
94% of StudySmarter users get better grades.Sign up for free