(i) Calculate the work done against surface tension forces in blowing a soap bubble of 1 cm diameter if the surface tension of soap solution is 2.5×10 –2 Nm –1 .
(ii) Find the work required to break up a drop of water of radius 0.5 cm into drops of water each of radius 1mm assuming isothermal conditions. (surface tension of water = 7 × 10 –2 Nm –1 )
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(i) 1.57 × 10 –5 J
(ii) 88 × 10 – 5 J
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