Boiling Eggs

[c3111068]

Hi, When heating/boiling things, that are solid, ie, rubber, metal, foods, they tend to melt, with the exeption of eggs, which turn solid...why?? Steph

[football]

Heating or boiling eggs turn solid because eggs are protein & the process strengthens the molecular bond. In the others (rubber, metal, choclate) heat weakens the bond. Water gives an example of transfer from liquid to solid/ice or gas/steam.

[Impret-Sir]

just to be accurate, steam is not a gas, it is a vapour, ie tiny droplets of liquid water in a cloud.

[Hamish]

You can also 'cook' the white of an egg by freezing it in liquid nitrogen. It remains white solid once warmed up.