Interfacial tension plays a critical role in the coalescence of water droplets in a crude oil emulsion. Coalescence is the process by which two or more small droplets merge to form a larger droplet. This is a key step in emulsion breaking, as it leads to the separation of the water and oil phases. Interfacial tension is the force that exists at the interface between two immiscible liquids, such as water and oil, due to the differences in their intermolecular forces. It represents the energy required to create or expand the interface. A high interfaci....
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