Temperature pressure... how and why?

There are two rooms next to eachover, both of them connected by an iron door.Room one is on fire, and it is extremely hot at a burning 600 degrees cen

There are two rooms next to eachover, both of them connected by an iron door.
Room one is on fire, and it is extremely hot at a burning 600 degrees centagrade.
Room two is ok, at a cool 20 degrees.
The door is opened. What happens next? Is there an explosion or something?
Thanks.

or:There are two rooms next to eachover, both of them connected by an iron door.Room one is on fire, and it is extremely hot at a burning 600 degrees centagrade.Room two is ok, at a cool 20 degrees. The door is opened. What happens next? Is there an explosion or something?Thanks.

Tags:iron,