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In a system where 20 liters of argon are in thermal equilibrium with 20 liters of helium, we analyze the average kinetic energy of the molecules. Given that both gases are monatomic with molar masses ( M_{Ar} = 40 , g/mol ) and ( M_{He} = 4 , g/mol ), we can apply the principles of kinetic theory. Despite the differences in mass, both gases at the same temperature have the same average kinetic energy. However, helium, with a smaller mass, will have molecules that move faster, on average, than argon molecules.
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20 liters of Argon are in thermal equilibrium with 20 liters of Helium. (These are monatomic gases, Mar=40, Mhe=4.) Which molecules have more kinetic energy, on average? A] Argon B] Helium C] Both have the same Which molecules are moving faster, on average?
