Which describes a feature of the physical properties of all substances?
O
can dissolve in water
can conduct heat and electricity
rearranges atoms to form new substances
does not change the identity of a substance
O

D. Does not change the identity of a substance

Explanation:

I’ve already taken the test on edg 2020 and got it right

Im not sure

Explanation:

Im stupid

the correct option is option d

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.