# Formula or list needed for gas 'critical temperature' calc

1. Jul 27, 2008

### bitman

Hi

Is there a formula which predicts at which temperature a gas condenses to a liquid ?. I think its called the critical temperature.

I've found out thay C02 is 31C and Nitrogen -178.

If not a formula can someone point me to a list of gases with info. I'd be quite interested to know what causes this change at the molecular level. The pressure increase forces the atoms closer and closer together but what triggers the change to a liquid ?

Should this be posted in the theoretical forum ?

Best regards

Bitman