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Title: A gas containing both hydrogen molecules and helium atoms has a temperature of 300 K. How does the average spe? Post by: smokebomb13 on Nov 19, 2012 A gas containing both hydrogen molecules and helium atoms has a temperature of 300 K. How does the average speed of the hydrogen molecules compare to the helium atoms?
Title: A gas containing both hydrogen molecules and helium atoms has a temperature of 300 K. How does the average spe? Post by: smmrwds on Nov 19, 2012 Helium is monoatomic. While Hydrogen is diatomic.
Therefore, Since the molecular weight Helium is 2 and a diatomic Hydrogen is 2. I believe the speeds should be exactly the same. EDIT: Here is the math involved. velocity (particle) = sqrt(3RT/M) where R= gas constant (8.314 kJ/kg*K), T=temperature, M=molar mass. velocity (hydrogen)= sqrt(3(8.314)(300)/2) = 61.1 m/s velocity (helium) = sqrt(3(8.314)(300)/2)= 61.1 m/s |