Use the information below to calculate delta h for the following reaction 2no2(g)=n2o4(g) 2n2(g)+202(g)=2no2(g) delta h=67.7 kJ
n2(g)+2o2(g)=n2o4(g) delta h=9.7 kJ

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.

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

The correct answer would be b) volume versus temperature, because they are also directly proportional.