Question

At room temperature, the surface tension of water is 72.0 mJ·m–2. What is the energy required to change a spherical drop of water with a diameter of 1.20 mm to five smaller spherical drops of equal size? The surface area of a sphere of radius r is 4π r2 and the volume is 4π r3/3.

Answer 1

find the volume of the large drop, find its surface tension

divide the volume by 5, then find the surface tension of the drop that has that volume

multiply by 5

compare the energy of the large drop to the 5 smaller ones