Why aren't we supposed to boil a glass coffee pot empty?

Question

I was looking at the coffee machine at work and I noticed the coffee pot said not to use it if it were to be boiled empty and was just wondering why this is.

Answer 1

I think what it means is to not let the pot boil until its empty. I did this once, forgot all about it, and the glass just exploded from the heat. When you have fluids in the pot, it helps to disperse the heat, but, when its empty, it can't handle it, so it breaks. I'm sure there is some scientific term for it, but, I can't remember it.

Answer 2

Because it could break.

Answer 3

The glass could crack and break.

Answer 4

lol you cant boil something thats empty

they mean don't leave the pot on the burner while its on but has no coffee in it

cuz that can beak the glass cuz the water/coffee absorbs most the heat

so the glass will get really really hot if its empty =- and break

Answer 5

The glass would heat up and crack, if there was liquid, then most of the heat energy gets transfered to the liquid.

Answer 6

The reason the glass can break is because of the uneven heating, leading to thermal stresses vertically across the glass.  when there is liquid in there, the liquid aids to heat the coffee pot evenly.  If you have a metal coffee pot, it's safe to ignore that rule, but why would you want charcoal cake coffee anyway.

Answer 7

the glass would crack and break and who wants to buy a new coffee pot?

Answer 8

Boiled empty???? Exactly what would you be boiling? It's empty.

Putting a coffee pot on a hot burner can cause the pot to crack and break. If not at the very least it bakes on any residue in the pot onto the glass making it smell like burnt coffee which is extremly discusting. It also makes it very hard to clean.

Answer 9

Uh, the glass will break when heated up if it's empty.

Answer 10

Glass will explode everywhere because there is nothing inside the coffee pot to heat up but glass.