Why Does Paper Stick to Hot Bowls?

[mkbh_10]

What is the reason for paper getting stuck to a hot bowl when it is kept on paper for a certain period . I hve seen particularly that newspaper when placed under a hot bowl gets stuck to the bottom of bowl when the bowl is lifted ?

I think the cohesive forces b/w the the two surfaces must playing some part but at high temp shudn't the magnitude of force b/w the two be less due to thermal agitation.

 

[Danger]

I don't know if this is the correct answer in your situation, but my experience is that the paper frequently becomes damp. In that case, it would be the surface tension of the water causing adhesion.

 

[sir-pinski]

The main reason for paper getting stuck to a hot bowl is due to the combination of heat and moisture. When paper is placed under a hot bowl, the heat causes the moisture in the paper to evaporate, creating steam. This steam then gets trapped between the paper and the bowl, creating a vacuum effect that causes the two surfaces to stick together.

Additionally, as you mentioned, cohesive forces between the paper and the bowl also play a role. These forces are stronger when the paper and bowl are both hot, as the heat increases the molecules' movement and allows them to form stronger bonds.

However, it is important to note that this phenomenon may not occur with all types of paper. The absorbency and thickness of the paper can also affect how it reacts to heat and moisture. For example, thicker or more absorbent paper may not stick as easily to a hot bowl compared to thinner or less absorbent paper.

In conclusion, the combination of heat, moisture, and cohesive forces are the main reasons why paper sticks to hot bowls. To avoid this, you can try using a thicker or less absorbent paper, or simply wait for the bowl to cool down before placing it on paper.