Surface Tension: Bubble Volume & Container Wall Contact

[Otaku123445]

Homework Statement

An air bubble rises in water and makes contact with a container wall. Does contact with the solid surface change the bubble volume even if the surface is neither hydrophilic nor hydrophobic, but forms a contact angle of 90 degrees with the air-water interface?(Neglect Hydrostatic pressure)

Homework Equations

Young's Equation
γsl - γs + γlv.cos θ = 0

The Attempt at a Solution

I know for sure that if hydrostatic pressure is taken into account, then as the bubble rises it expands. But, in the absence of pressure as it hits the container there is only tension forces. But, I'm not sure if the radius of curvature of bubble will be larger or smaller .

 

[Carrock]

If you consider the shape of a container which minimises the ratio of surface to volume that should help you with the radius of curvature.

I don't think surface tension can be included without hydrostatic pressure (the bubble would sink) so the question really seems to be "If you change the shape of a closed container of air, without changing the pressure, does the volume change?"

I feel the real problem here isn't with you but whoever set this sloppy question.