Melting Ice in Olive Oil

Category: Education

Presentation Description

This video helps explain what happens when ice melts in olive oil. The Image of the water molecule came from the following website:


Presentation Transcript

Melting Ice in Olive Oil : 

Melting Ice in Olive Oil By Sarah Harris & Scott Dealy

The Phenomena : 

The Phenomena Olive Oil and Water don’t mix. When you put these liquids together, the Oil will always float on top of the water. However if you place an Ice cube into the liquids something strange occurs! Frozen water, ice, FLOATS on oil. Why does this occur, and why does the water settle on the bottom of the glass?

? : 


At Room Temperature : 

At Room Temperature Olive Oil is non-polar, whilst water is polar. Non-polar and polar particles don’t mix



Particles in a liquid : 

Particles in a liquid The thermal energy surrounding a liquid provides enough energy for particles in a liquid to move. Although there is a considerable amount of attraction between particles in a liquid, this energy, now kinetic energy, allows the particles to flow past each other rather than forcing them into a formal structural position. As well as flowing, each particle will spin and vibrate. Lets look at the liquid water and oil particles again!

Add an Ice Cube : 

Add an Ice Cube Why did this occur?

At a low Temperature : 

At a low Temperature An Ice cube in a purple glass



Particles in a Solid : 

Particles in a Solid The thermal energy surrounding a solid does not provide enough energy for particles to overcome their strong affinity for each other. The particles are bonded tightly together in a set position. Like in liquids, each particle can still vibrate and spin, due to the available kinetic energy, but it is unable to move from its rigid lattice like structure. Lets look at the solid water and oil particles again!

But How Does This AnswerOUR PROBLEM? : 

But How Does This AnswerOUR PROBLEM?

WELL… : 

WELL… The Ice floated because as a solid, the particles in the water are arranged in such a pattern that there is space in between them. This space made the ice less dense and, in effect, lighter than both the oil and the liquid water. Similarly the oil is also less dense than the liquid water, that is why when mixed together it settles on top of the water and not the other way around. Lets look at the particles in a solid again. Take notice of the space between the particles.

ALSO… : 

ALSO… The Ice melted because it was in a warmer environment. The increase in thermal energy meant that a sufficient amount was converted to kinetic energy, thus allowing the particles to overcome the extremely strong bonds between them. The particles were now able to flow freely as a liquid. As mentioned earlier however, liquid water is more dense than ice and oil, so it settled at the bottom of the glass. The water formed droplets that sunk. They didn’t mix with the oil because polar and non-polar liquids don’t mix.

Additionally… : 

Additionally… If we look closer at a water molecule we can learn a lot more. In our representation we used blue circles to represent water, the diagram here shows a more detailed representation of a particle of water. Each particle is composed of one Oxygen atom and two Hydrogen atoms. The particle has an elbow shape, it is this shape that allows for the large space in solid water. The very same space that causes ice to be less dense than water. Also, as mentioned, water particles are polar, they have a positive end and a negative end, the particles form bonds in a special way. Each positively charged hydrogen atom bonds with a negatively charged oxygen atom. Using this knowledge lets look at another representation of particles in solid water


THE END Positively charged ^

authorStream Live Help