Does Pure Water Always Remain a Liquid When Heated Without Nucleation Sites?

[Kyoma]

When a matter changes state (from liquid to gas, etc.), does it undergo nucleation?

 

[johng23]

Sometimes.

 

[Kyoma]

Thanks.

Another question, if you heat PURE water continuously, and that there is nothing to disturb it and it is free of nucleation sites, will it remain a liquid forever until something disturbs it?