Surface and Interfacial Phenomena
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Questions and Answers

What is the main cause of interfacial tension between two immiscible liquids?

Imbalance of forces

Where does the contact angle occur?

Against the solid

What is the relationship between interfacial tension and surface tension?

Interfacial tensions generally lie between the surface tensions of the two liquids

What does wetting involve?

<p>Displacement of either a liquid or gas from a surface by a second liquid</p> Signup and view all the answers

What occurs when a drop of liquid is placed on a flat, smooth horizontal surface?

<p>It may spread completely or form a drop</p> Signup and view all the answers

Define interface.

<p>Boundary between two phases.</p> Signup and view all the answers

What is surface tension?

<p>Force acting parallel to the surface and at right angles to a line of 1 m length.</p> Signup and view all the answers

How is surface free energy defined?

<p>Work required to increase the surface area by 1 m2.</p> Signup and view all the answers

What is the unit of surface tension?

<p>N m-1.</p> Signup and view all the answers

Explain the symbol ɤL/V.

<p>Surface tension between a liquid and its vapour.</p> Signup and view all the answers

How are interfacial phenomena in liquids usually considered?

<p>In terms of surface tension.</p> Signup and view all the answers

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