The Science Behind Egg Solidification When Heated

In summary, when heating a solid, it typically changes to another solid, liquid, or gas. However, an egg is unique in that when heated, its liquid form becomes a solid. This is due to the denaturation of proteins in the egg, which causes a change in structure and renders the egg insoluble. Boiling an egg until it becomes a gas is possible, but it must go through an intermediary step of being metabolized. This is because heat disrupts the bonds and interactions between molecules, causing the proteins in the egg to denature and coagulate.
  • #1
jobyts
227
64
Question on egg :)

Mostly, when you heat a solid, it changes to anoher solid, or liquid, or gas. The only thing I have seen a liquid, when heated becomes solid is an egg. Can someone please explain the actual process that causes this?
 
Chemistry news on Phys.org
  • #2
jobyts said:
Question on egg :)

Mostly, when you heat a solid, it changes to anoher solid, or liquid, or gas. The only thing I have seen a liquid, when heated becomes solid is an egg. Can someone please explain the actual process that causes this?
It's not a pure chemical compound but a complex mix of many compounds, so you also have to consider how the whole structure change with heat and not simply the physical properties of a single compound.
 
  • #3
The solidification of an egg is due to the proteins in the egg changing structure (a.k.a. denaturation - google the term). The egg does NOT solidify due to a phase transition.

--------
Assaf
http://www.physicallyincorrect.com/"
 
Last edited by a moderator:
  • #4
The albumen is a compound of lots and lots of proteins (which would have been for the embryo). High temperature denatures the protein in the albumen, and it changes the structure. The process is irreversible (in this case) and then it becomes insoluble.

Anyone tried boiling an egg until it becomes a gas? Egg gas anyone?
 
  • #5
Invictious said:
Anyone tried boiling an egg until it becomes a gas? Egg gas anyone?
Yep. Do that all the time. But there's an intermediary step - it needs to be metabolized first.
 
  • #6
Heat can be used to disrupt hydrogen bonds and non-polar hydrophobic interactions. This occurs because heat increases the kinetic energy and causes the molecules to vibrate so rapidly and violently that the bonds are disrupted. The proteins in eggs denature and coagulate during cooking.
 

Related to The Science Behind Egg Solidification When Heated

What is egg solidification?

Egg solidification, also known as egg coagulation, is the process by which liquid egg whites and yolks become a solid mass when heated.

Why do eggs solidify when heated?

Eggs contain a protein called albumin, which denatures when heated. This means that the protein molecules change shape and bind together, forming a solid structure.

At what temperature does egg solidification occur?

Egg solidification begins to occur at around 140°F (60°C), which is when the protein molecules start to denature. The process is completed at around 158°F (70°C).

What factors can affect egg solidification?

The acidity of the egg whites, the temperature at which the eggs are cooked, and the presence of other ingredients such as salt or sugar can all affect the rate and degree of egg solidification.

Can you reverse egg solidification?

No, once the egg proteins have denatured and coagulated, they cannot be returned to their original liquid state. However, the solidified egg can be broken down and reformed into a different texture through techniques such as whipping or blending.

Similar threads

Replies
18
Views
3K
Replies
4
Views
5K
Replies
11
Views
1K
Replies
7
Views
2K
  • Introductory Physics Homework Help
Replies
25
Views
1K
Replies
23
Views
1K
Replies
2
Views
1K
Replies
5
Views
2K
Replies
131
Views
4K
  • Introductory Physics Homework Help
Replies
14
Views
2K
Back
Top