When you boil tomato soup it very easily "explodes" when reaching the boiling point. Why is that?
A related question has been answered here before: Why do some solutions eventually stop boiling and start "popping" as they get more concentrated? However, the answer to that question does not fully answer the current question since it does not address what properties in a solution causes superheating/bumping. That answer describes what we see but does not describe WHY it happens (except for the words "heated too rapidly", but many solutions can be heated with the same speed as tomato soup without "exploding").
For example, to my knowledge tomato soup only suffers the risk of "exploding" THE FIRST TIME it reaches the boiling point. Therefore I have thought the reason for the explosion could be that it contains gases that leave the solution violently. (I have read this is the reason that milk also may "explode" at the boiling point.)
Friends if mine suggest that the reason for the explosive boiling is the viscosity of tomato soup. But this answer would not explain why tomato soup only risks "exploding" the FIRST time it boils. (Without extensive experience I would also say that NOT ALL viscous solutions boil explosively.)
Tha tomatoes are naturally peeled so their elastic peel/membrane does not come into account.
The previous question also relates to gradual concentration which is not the issue of the current question. The current question relates to reaching the boiling point.
So this question is not answered. To rephrase it slightly: What properties in tomato soup causes it to boil "explosively"?