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in Properties of Bulk Matter by (79.0k points)
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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 4VT (1/r - 1/R) is released

(b)  energy = 3VT(1/r+1/R)  is absorbed.

(c)  energy = 3VT(1/r-1/R) is released

(d)  energy is neither released nor absorbed.

1 Answer

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Best answer

Correct option (c)  energy = 3VT(1/r-1/R) is released

Explanation:

Let n droplets each of radius r coalesce to form a big drop of radius R.

:. Volume of n droplets = Volume of big drop

Decrease in surface area

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