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प्रश्न
Define the surface energy of the liquid.
उत्तर
The potential energy is greater for molecules at the surface film as compared to molecules well inside the liquid. This extra energy of the molecule on the surface layer of a liquid is called the surface energy of the liquid.
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संबंधित प्रश्न
Derive the relation between surface tension and surface energy per unit area.
The radius of a soap bubble is blown up to double its value under isothermal conditions. If 'r' be the initial radius of the bubble, and T be the surface tension, then energy spent in doubling the radius is ______
Energy needed in breaking a drop of radius R into n drops each of radius r is given by ____________.
Assertion: If work done in increasing the size of a soap film from 10 cm x 4 cm to 10 cm x 8 cm is 2 x 10-4 J, then the surface tension is 5 x 10-4 N m-1.
Reason: Work done = Surface tension x increase in area.
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(T = surface tension of water, g = gravitational acceleration)
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On the surface of the liquid in equilibrium, molecules of the liquid possess ____________.
Consider a process shown in the figure. During this process, the work done by the system ______.
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(surface tension of water = 7.2 x 10-2Nm-1)
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Calculate the work done in blowing a soap bubble to a radius of 1 cm. The surface tension of soap solution is 2.5 × 10-2 N/m.
If T1, T2 and T3 are the forces due to surface tension at the liquid-s solid-gas and liquid-gas interfaces such that T2 - T1 ≅ T3 and the contact angle for the liquid-solid pair is θ then ______.
Prove that, equivalent S.I. unit of surface tension is J/m2.
Calculate the amount of energy evolved when 343 droplets of mercury each of radius. 0.05 mm, combine to form one drop. The surface tension of mercury is 50 x 10-2 N/m.
