In a crude model of a rotating diatomic molecule of chlorine (Cl2), the two Cl atoms are 2.00 multiplied by 10-10 m apart and rotate about their center of mass with angular speed ω = 1.80 multiplied by 1012 rad/s. What is the rotational kinetic energy of one molecule of Cl2, which has a molar mass of 70.0 g/mol?

ans in J

Question

In a crude model of a rotating diatomic molecule of chlorine (Cl2), the two Cl atoms are 2.00 multiplied by 10-10 m apart and rotate about their center of mass with angular speed ω = 1.80 multiplied by 1012 rad/s. What is the rotational kinetic energy of one molecule of Cl2, which has a molar mass of 70.0 g/mol?

ans in J

jamesj · Answer

well, what's the speed of one of the atoms, v?  Then the ke is just (1/2)mv^2