Not really.
[nerd]
In order to get freeze, a fair amount of compressed air has to be released rapidly through a small aperture. A full scuba tank, for example, holds a phone booths volume of air (compressed) at 3000psi. When the valve is opened, the air escapes with a loud hiss and its noticeably (and rapidly) cooled by the Joule-Thomson effect. Nevertheless, this dramatic pressure reduction is
not enough to freeze anything.
Now unless Supes has some bizarre internal anatomy, he has no means to compress air within his lungs to scuba tank pressures. So his maximum lung capacity and pressure would be the same as a normal human of the same size. Ergo, Supes would be dealing with
less pressure than a scuba tank
and a scuba tank (as noted) is
not an especially efficient freezer.
But even
if Supes could produce the requisite pressure differential, the freezing air (necessarily) would have a hurricane-level force. And often, Supes power is depicted as a nondestructive and aim-able freeze ray. (In a
L&C episode, I recall Clark chilling a martini glass with a gentle breath.)
In other words, the Joule-Thomson effect is real; but it doesnt really support Supes' freeze breath power as its usually represented.
[/nerd]