[Lewis Thomson (OP)]

Johnny would like help finding the answer to this question.

"At what pressure & temperature does Carbon become a liquid?"

Discuss in the comments your answers...

[Eternal Student]

Hi.

This is the only phase diagram I found:


phase diagram.JPG (54.21 kB . 658x473 - viewed 567 times)

Under the temperatures and pressures shown for the yellow section, it should be liquid.

It's from a discussion here:  https://chemistry.stackexchange.com/questions/6068/what-is-known-about-liquid-carbon 
I cannot vouch for the reliability of this information.

Best Wishes.

[evan_au]

Another property of liquid carbon is that it will glow: At a temperature of around 5000K, it will give off white light.

You need to ensure that carbon is not exposed to oxygen as you heat it, as it will no longer be carbon...