The batery is most likely too smal and when the car drawls the
amprage that it nneeds it causes the acid to boil. Fix this by
instaling a larger batery.
How does your car sound if you put in a battery after a month?
If your question is what may be a problem with a car that you
have to change the battery after a new battery was installed a
month ago? Then the alternator may be suspect and or a draw from
the electrical system.