top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

Why does milk overflow when boiled while water does not?

+2 votes
Why does milk overflow when boiled while water does not?
posted Apr 10, 2016 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

Milk is not a simple liquid — it contains tiny globules of fat and casein which are not dissolved but suspended in water. On heating milk, there occurs a separation of constituents and some elements like cream, being lighter, float up.

After some time, a membrane-like film containing cream and casein is formed. When milk begins to boil, the heat energy is used for the conversion of water into steam.

As a result, the pressure below the film increases suddenly and the rising bubbles of steam makes the milk overflow. On heating water, no such film is formed and the bubbles of steam formed by boiling escape easily without any resistance. Hence, water does not overflow on boiling.

answer Apr 11, 2016 by Manikandan J
Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.