Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?
Correct answer: D. Interfacial tension
- A. Liquid density
- B. Liquid viscosity
- C. Hot surface temperature
- D. Interfacial tension
Explanation
Interfacial tension strongly controls the force holding a vapour bubble to the heated surface and therefore affects the size and rate of its detachment. Liquid density and viscosity also influence bubble motion, but are not usually the dominant controlling factor in this context.
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