Question

3- The figure below shows a gas bubble confined in a 5.0 µm diameter capillary tube that is wet byoil at the oil/gas interface and by water at the water/gas

interface. The bubble is motionless. The contact angles measured through the wetting phases were 10° for water gas interface and 30° forthe oil'gas interface. Determine the pressure in the water phase if the pressure in the oil phase is 100kPa. The interfacial tensions are 72 mN/m at the water/gas interface and 36 mN/m at the oil/gasinterface.

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