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Actually change of state implies turning of a PURE SUBSTANCE from liquid to solid when temperature is low (this composition remains constant and no alteration in composition or structure takes place). But egg contains a mixture of many substances, such as protein, carbohydrate etc. When proteins are heated, their structure changes (this is called "de-natured"), and they become more rigid. This is what happens when you cook an egg. The following is from Wikipedia (and the link to the page is found on the left of this answer: When proteins are heated they become de-natured and change texture. In many cases, this causes the structure of the material to become softer or more friable - meat becomes cooked. In some cases, proteins can form more rigid structures, such as the coagulation of albumen in egg whites. The formation of a relatively rigid but flexible matrix from egg white provides an important component of much cake cookery, and also underpins many desserts based on meringue. Other things other than eggs also tend to become more solid when cooked. For some things, this is due to the water in the food evaporating, and thus concentrating down the ingredients. As a simple example, if you take sugar and add it to water, the water will still be very "liquid" (more precisely, not very viscous). However, if you boil that sugar water for a while, and let a lot of water evaporate, the sugar water will become thicker and more viscous, and eventually become a thick syrup. If you evaporate all the water, you'll get back solid sugar crystals!
Wiki User
∙ 16y ago
Wiki User
∙ 11y agoThe whitening of the egg while cooking is caused from the proteins being denatured. The protein molecules unravel and stick to each other, which changes the way light passes through them. Because there are no other pigments or colors in the clear part of an egg egg, it appears white.
Wiki User
∙ 13y agoThe chemical makeup of an egg causes it to turn solid when exposed to heat.
Wiki User
∙ 11y agothe protein in it coaggulates
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Why the boiled egg spin perfectly?
Because a cooked egg is flat and fried in comparison to a boiled egg. A hard boiled egg has a hard shell and it is dry inside. With an ordinary egg it is soft inside and sensitive that's why.
How do you differentiate between boiled egg and raw egg without using water?
Spin it on a table. The boiled egg will keep spinning since it is solid. The raw egg will not spin much since the solid shell is spinning while the liquid inside is not.
Why does a hard boiled egg spin?
the yolk,the heavier part of the egg would have coagulated into a solid core in the centre,lowering the centre of gravity of the egg,and hence decreasing the inertia of its rotational moment..hence it spins better when hard-boiled
What are the ways of knowing that a hard boiled egg is hard boiled?
Spin the egg! If the egg is raw it will wobble, because it's still liquid inside, if it's hard boiled it will spin on it's end, because it's solid.
What is the difference between hard boiled eggs and soft boiled eggs?
A hard boiled egg is cooked until solid all the way through, a normal 'soft' boiled egg the centre yolk will still be runny, To test the egg you need to do is spin the egg on a flat surface, if the egg is soft boiled it will wobble because part of the egg is still liquid, if it is hard boiled it will spin on end, because the contents are solid.
What liquid can turn into a solid but cannot change back?
an egg
What liquid turn to a solid when boil?
What is liquid that turn to a solid when boil is egg before boil its lequid after boild it is solid.
If boiled egg have been mixed with fresh eggs in a basket how do you which is which?
Spin the egg on a flat surface, a raw egg will wobble as the contents are liquid, a soft boiled egg will try to stand up, and a hard boiled egg will stand up and spin without wobbling as it is solid inside.
What is scientific reason between boiled and non boiled egg?
Boiling (or cooking an egg by any process) triggers crosslinkages between the protein molecules in the egg, solidifying it. A boiled egg can be spun and can stay spinning because it is solid throughout. A non boiled egg cannot be spun, it stops almost immediately because the liquid inside stays stationary and because of friction between the shell and the liquid.
What are hard boiled eggs made of?
A hard boiled egg is made of..... egg. It is simply a whole egg, in the shell that has been placed in boiling water. The heat causes the liquid egg inside the shell to become solid. The yolk of the egg becomes the yellow center, and the clear "white" of the egg becomes the white outer part of the boiled egg. Remove shell, add salt to taste, eat.
When is an egg hard boiled?
When you can spin it like a top on one end. An uncooked egg will not continue to spin due to the liquid in it. A hard boiled egg WILL continue to spin due to more of a solid internal mass.
What does that mean when a egg stands up?
If you spin an egg and it stands up on end, it means it is hard boiled (solid inside), if it is raw it will wobble because it is liquid inside.
