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Pollution and Car Maintenance
Service stations seem to charge a lot to change the oil and antifreeze in a car. It seems much easier to just do this in
the alley behind the house. The old oil and antifreeze can be dumped out, since no one ever walks in the alley.
Select one or more:
O a. sediment
O b. toxic
O c. bacterial
O d. nutrient
Check

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

i don,t know so just answer mine

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.