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← ScienceWhich consequence results when isotopic fractionation occurs during evaporation?
A)Vapor pressure remains consistent
B)Lighter isotopes concentrate in vapor✓
C)Equilibrium shifts unpredictably fast
D)Heavier isotopes vaporize preferentially
💡 Explanation
Vaporization causes kinetic isotopic fractionation because lighter isotopes have higher vibrational frequencies, therefore they break away more easily and concentrate in the vapor, rather than heavier isotopes, under non-equilibrium conditions.
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