If the potential energy between two molecules in given by U = A/r¹² - B/r? then at equilibrium, separation between molecules, and the potential energy are:
If the potential energy between two molecules in given by U = A/r¹² - B/r? then at equilibrium, separation between molecules, and the potential energy are:
Option 1 -
(B/A)¹/⁶, -A²/2B
Option 2 -
(2B/A)¹/⁶, 0
Option 3 -
(B/A)¹/⁶, -A²/4B
Option 4 -
(2B/A)¹/⁶, -A²/2B
Asked by Shiksha User
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1 Answer
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Correct Option - 3
Detailed Solution:F = -dU/dr = - [-12A/r¹³ + 6B/r? ]
F=0 ⇒ r= (2A/B)¹/?
U (at r= (2B/A)¹/? ) = -A²/4B
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