Do all exothermic phase changes have a negative value for the entropy change of the system?

the answer is: metamorphic rocks often show the presence of fossils, also a

hope i

-lavira: )

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds