No... bleach is hypochlorite, not HCL in solution. To heat the bleach hot enough to dissociate the chlorine that way, would require temperatures higher than 100c.
(here is a nice informative site on the chemistry of thermal decomposition of hypochlorite.)
http://www.powellfab.com/technical_information/sodium_hypochlorite/decomposition_reason.aspxIt turns into either saltwater and oxygen, or into salt water, and sodium chlorite.
Instead, it makes it more readily combine with amine groups found in the hair, forming chloramines. Just ventilate the room, and dont huff it.
Also, weird, maybe don't spout off about chemistry you don't understand when it can get people hurt?
back at 'ya buddy. To dissociate the chlorine thermally, in the absence of a reactant (like an acid), would require heating it well beyond the boiling point.
Chloramines are nasty, and can be very bad for you, (and are the primary thing produced when you stupidly mix bleach and ammonia), however, they are also released when you use bleach to clean up organic messes, like blood, feces, or dry urine. This includes substances like hair. The normal use of bleach as a cleanser will release chloramine when it is used in this context. Heating it causes the reaction to be more ... energetic... and rate of release is hgher. With ventillation, it is not that big a deal.
If you were somehow stupid enough to mix it with an acid, then the dissociated hydronium ions in the water will first reduce the hypo's oxygen, to make more water-- then would reduce the chlorite component further, producing various things, including HCl gas, depending on how strong the acid was.
We should already know not to mix household bleach with mysterious cleansers that contain acids, especially when we have turned up the reactivity by making it hot.
Just getting the bleach hot though? Does not make make either free chlorine dimer (Cl2), or hydrochloric acid vapor (HCl). It increases the rate of normal decomposition of the hypo into salt water, oxygen, and chlorite. Nothing else, at least not while still aqueous.