thanks for your query at HCM.Ear pain
and burn can be due tom damage to internal ear structures
It is very hard to predict the amount of hearing loss
just based on symptoms.
Through ear examination might be needed for extent of the damage.
If outer or middle ear structures are damaged prognosis is good.
Inner damage can be very serious .
My recommendation would be you consult ent specialist
get throughly examined for further investigation to determine the extent of the damage.