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If the potential energy between two molecules is given by U = A/r^6 + B/r^12, then at equilibrium, separation between molecules

Physics

Last Post by nikhil04 4 years ago

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20/09/2020 12:36 pm

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aditi07

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If the potential energy between two molecules is given by U = A/r⁶ + B/r¹², then at equilibrium, separation between molecules, and the potential energy are :

(1) (B/A)^1/6, 0

(2) (2B/A)^1/6, A²/4B

(3) (2B/A)^1/6, A²/2B

(4) (2B/2A)^1/6, A²/2B

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20/09/2020 12:40 pm

nikhil04

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(2) (2B/A)^1/6, A²/4B

Explanation:

U = A/r⁶ + B/r¹²

f = - dU/dr

For equilibrium

So r = (2B/A)^1/6, A²/4B

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If the potential energy between two molecules is given by U = A/r^6 + B/r^12, then at equilibrium, separation between molecules

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