Why do solids compress more than liquids under pressure?

In summary, the conversation discusses the differences in packing of atoms in solids, liquids, and gases. While liquids are often considered incompressible, the reality is that both solids and liquids can compress with pressure, although it may not be noticeable in everyday life. The idealization of incompressible liquids is still useful for problem-solving. The example of water being more dense than ice is given, and the concept of treating solids and liquids as incompressible as a first order approximation is mentioned.
  • #1
curious bishal
14
0
Atoms in solid are more closedly packed as compared to liquid and gases. But we exert more force, some solid gets compressed but liquid doesn't, why? If atoms are loosely packed in liquid than solids, liquids should get compressed...
 
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  • #2
curious bishal said:
Atoms in solid are more closedly packed as compared to liquid and gases. But we exert more force, some solid gets compressed but liquid doesn't, why? If atoms are loosely packed in liquid than solids, liquids should get compressed...

Can you give an example of a solid which gets compressed?
 
  • #3
The OP is confusing an idealization (incompressible liquids) with reality. Real liquids do compress. Nevertheless, the idealization is very useful to solve problems. BTW, liquids are not necessarily more loosely packed than solids. Water, for instance, is more dense than ice (at standard pressure).
 
  • #4
adjacent said:
Can you give an example of a solid which gets compressed?
Every solid and every liquid compresses with pressure, except for unobtainium of course. As it takes a good deal of pressure to result in even a very small change in density, treating solids and liquids as incompressible is a good first order approximation.
 
  • #5
D H said:
Every solid and every liquid compresses with pressure, except for unobtainium of course. As it takes a good deal of pressure to result in even a very small change in density, treating solids and liquids as incompressible is a good first order approximation.

I didn't mean solids can't be compressed.I was asking in common terms(everyday life).
 

1. What is the difference between the structure of a solid and a liquid?

The main difference between the structure of a solid and a liquid lies in the arrangement of their particles. In a solid, the particles are tightly packed and held in fixed positions by strong intermolecular forces. In a liquid, the particles are more loosely packed and can move around freely, but are still held together by weaker intermolecular forces.

2. How does the structure of a solid affect its properties?

The structure of a solid greatly influences its physical and chemical properties. For example, a crystalline solid with a regular, repeating arrangement of particles will have a higher melting point and be more rigid than an amorphous solid with a random arrangement of particles. The structure also affects properties such as density, hardness, and conductivity.

3. What factors determine the structure of a solid or liquid?

The structure of a solid or liquid is determined by several factors, including the type of particles present, the strength of intermolecular forces, and the temperature and pressure of the system. For solids, the crystalline structure is also influenced by the rate of cooling during formation.

4. Can a solid turn into a liquid without changing its temperature?

Yes, a solid can turn into a liquid without changing its temperature through a process called melting. This occurs when the solid absorbs enough energy to overcome the strong intermolecular forces holding its particles together, causing them to break free and flow as a liquid. This is known as a phase change or a change in state.

5. How does the structure of a liquid allow it to flow?

The loosely packed particles in a liquid are able to slide past each other and move around freely, allowing the liquid to flow. This is due to the weaker intermolecular forces between the particles compared to those in a solid. However, the particles in a liquid are still close together, which gives liquids a fixed volume and makes them difficult to compress.

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