Very likely you have a blown head gasket. Condensation is a possibility, but this sounds new. There are commercially available head gasket testers. Check your coolant level and oil condition. Low coolant indicates a leak that you can't see aka steam.
because it can
Plugged PCV valve or hose
A cracked engine block
blow by through the turbo ,my truck did the same thing had to get the turbo rebuilt
no
A dumb terrorist tried to blow up a bus, but he burned his lips on the tailpipe.
Excess fuel causes black smoke.
It could be transmission fluid or coolant, or a problem with the catalytic converter.
The orgin of blow off some steam comes from old steam boilers. To let "off steam" or "blow off steam" would be to relieve the pressure in the boiler, to avoid risk of damage. When talking about a person, it means they are venting their thoughts, as a form of stress relief.To calm down and or from getting mad.
heater will not blow on a 1996 ford contour
The phrase "blow off some steam" means to release pent-up energy or frustration in a healthy or constructive way.
It's called "blow-by", a condition caused by combustion gasses leaking past the piston rings. It's an indication that the engine has not been adequately maintained. That means that you are in need of a new set of piston rings.