(a) estimate δh for this reaction. bonds broken kj/mol bonds formed kj/mol rch2—br entry field with correct answer 285 rch2—or entry field with incorrect answer now contains modified data 435 rch2o—h entry field with correct answer 435 h—br entry field with incorrect answer 368 sum = entry field with incorrect answer 83 kj/mol

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.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.