Question

a chemical reaction that happens in your home that works without heating

Answer 1

Dear student,
A chemical reaction is the formation of a new substance. For example
                        a.   The burning of fuel, is an example of  chemical changes which occur due to the chemical reaction.
b. We use rice, dough and eggs in our home for making boiled rice, chapati and omelettes and  ripening  of  fruits , 
This shows how the original substance is converted to form new substance in a chemical reaction. 

Answer 2

breathing we do ,
when we bath clinging of soap molecules,
if you have silver or copperrings oxidation of them,
if the pipe lining to your house is with iron rusting of it etc.,