B) What is the change in entropy of the reaction if ΔH° = -3.2 kJ mol-1?

I would go w A I just took the test it was very way I got straight b on it

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.