A soap bubble has radius R and surface tension S, How much energy is required to double the radius without change of temperature.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
On doubling the radius,
Δ A = 4 π (2 R) 2 – 4 π R 2 = 12 π R 2
but Δ W = (2 × Δ A) × S = 24 π R 2 S.
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