Automobile airbags produce nitrogen gas based on the reaction:
2nan3(s) -> 2na (l) + 3n2 (g)
a. if 2.25 g of nan3 react to fill an air bag, how much p-v work will the n2 do against the external pressure of the 1.00 atm given that the density of nitrogen is 1.165 g/l at 20 degrees c?
b. if the process releases 2.34 kj of heat, what is the δe for the system?

what are the statements

you did not give any options thus this is the best answer i can give to you with this little information you have given

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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.