Heterogeneous nucleation - Mentos and coke

[Kruler]

Hello guys , I'm a medical student , and I'm very fascinated by this Mentos and diet cola experiment , however i do not understand it completely and i would like to know the followings
-From my understanding it happens because of Heterogeneous Nucleation , is that right ? Then i do not undertand why is the CO2, which starts as liquid form turns actually into gas ? isn't supposed to turn into solid by common logic ? I don't really understand that.
-Why is that happens mainly when the mentos sinks at the bottom of the coke ?
-After this phenomenon, is the liquid (coke) + CO2 still pressurized ? if its not , why is it losing it's pressure ?
-Last question about the pressure - does a super-pressurized coke will produce an higher eruption ?

I read some in the internet , but every website explains the Nucleation process differently , i think i understand it , but not fully though.

I asked a lot of questions , but I'm really curious :)

 

[CWatters]

Then i do not undertand why is the CO2, which starts as liquid form turns actually into gas ? isn't supposed to turn into solid by common logic ?

The C02 starts off as a gas disolved in the coke. It stays a gas.

 

[Kruler]

The C02 starts off as a gas disolved in the coke. It stays a gas.

Thanks for the reply , so i assume that the cola + CO2 is a supersaturated solution , why is the mentos and the nucleation causing it to lose pressure ?

 

[Kruler]

sry for bumping guys , i would really appreciate if anyone knows a good webpage / article / book about nucleation (except wiki)