Question

A certain number of spherical drops of a liquid of radius 'r' coalesce to form a single drop of radius 'R' and volume 'V'. If 'T' is the surface tension of the liquid, then:

• A. energy = 3VT($\frac{1}{r}+\frac{1}{R}$) is absorbed.
• B. energy = 3VT($\frac{1}{r}-\frac{1}{R}$) is released.
• C. energy is neither released nor absorbed.
• D. energy = 4VT($\frac{1}{r}-\frac{1}{R}$) is released.

Answer 1

Answer: (B)

energy = 3VT($\frac{1}{r}-\frac{1}{R}$) is released.

Answer 2

The correct option (B): energy = 3VT($\frac{1}{r}-\frac{1}{R}$) is released.