KVPY2011ChemistrySurface Chemistry
Emulsification of 10 ml of oil in water produces 2.4 10¹⁸ droplets. If the surface tension at the oil-water interface is 0.03 Jm ⁻² and the area of each droplet is 12.5 10⁻¹⁶ ~m ² , the energy spent in the formation of oil droplets is-
Options
- A90 ~J
- B30 ~J
- C900 ~J
- D10 ~J
Correct answer
A. 90 ~J
Step-by-step solution
Total droplets =2.4 10¹⁸ total area = total droplets area of one drop =2.4 10¹⁸ 12.5 10⁻¹⁶=12.5 2.4 10² ~m ² Energy consumption array l =0.03 12.5 2.4 10² =90 Joule array