# The two atoms in a diatomic molecule exert an attractive force on each other at large distances and.

The two atoms in a diatomic molecule exert

an attractive force on each other at large distances and a repulsive force at

short distances. The magnitude of the force between two atoms in a diatomic

molecule can be approximated by the Lennard Jones force, or , where r is the

separation between the two atoms, and and F0 are

constant. For an oxygen molecule (which is diatomic) F0 = 9.60 X 10-11

N and = 3.50 X 10-11

m. (a) Integrate the equation for F(r) to determine the potential energy U(r)

of the oxygen molecule. (b) Find the equilibrium distance r0 between the two

atoms, (c)

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The two atoms in a diatomic molecule exert

an attractive force on each other at large distances and a repulsive force at

short distances. The magnitude of the force between two atoms in a diatomic

molecule can be approximated by the Lennard Jones force, or , where r is the

separation between the two atoms, and and F0 are

constant. For an oxygen molecule (which is diatomic) F0 = 9.60 X 10-11

N and = 3.50 X 10-11

m. (a) Integrate the equation for F(r) to determine the potential energy U(r)

of the oxygen molecule. (b) Find the equilibrium distance r0 between the two

atoms, (c) Graph F(r) and U(r) between 0.9 r0 and 2.5 r0.

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