Which best describes the energy change that takes place during deposition? Heat energy is released by the substance.
Heat energy is maintained by the substance.
Heat energy is slowly gained by the substance.
Heat energy is quickly absorbed by the substance.
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i think its 100

i hope this !

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.