5. As the water temperature is increased
from 20°C to 90°C, how many more grams
of copper sulfate will dissolve in 100 grams
of water?
g

the dissolution of polymer can be thermodynamically described in 2 steps.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.