Why Is It So ?

[Beer&Kebab]

I tried dry hopping a single POR pellet per bottle to see what POR tasted like dry hopped since it is so maligned. Anyways I only did 6 bottles from the batch. Every one is a volcano (way overprimed) while the rest of the batch is fine. Do more scientific of us have any ideas what why ? I have also noted when I dry hop into the primary after a week it can also send the airlock crazy.. Is there compressed air or something like that in the pellet ?

 

[Swinging Beef]

Congratulations!
You just discovered how the 'widget' in a can of Guiness works.
I am no scientist, but basically, the CO2 likes to have something to hang on to ... in this case, the hop bud. Then when it has the chance to go somewhere, like shooting out the top of your bottle... out it comes.

 

[earle]

When the hop pellet dissolves it's surface area increases enormously, providing an area which helps bring the gas out of solution causing your volcano.

 

[Wasabi]

Wikipedia explains it in a fairly straightforward manner

http://en.wikipedia.org/wiki/Nucleation

 

[Beer&Kebab]

Very interesting.. Thanks for the replies.. I certainly wont be doing that again..