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Emulsification of 10 ml of oil in water ...

Emulsification of 10 ml of oil in water produces `2.4xx10^(18)` droplets. If the surface tension at the oil-water interface is `0.03 Jm^(-2)` and the area of each droplet is `12.5 xx 10^(-16) m^(2)`, the energy spent in the formation of oil droplets is -

Text Solution

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Total droplets `=2.4 xx10^(18)`
Total area = Total no. of droplets `xx` Area of each drop
`=(2.4xx10^(18))xx(12.5xx10^(-16))=12.5xx2.4xx10^(2)m^(2)`
Total energy consumed in the fomation of droplets `=(0.03Jm^(-2))xx(12.5xx2.4xx10^(2)m^(2))=90J`
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