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Answer 1

Question 126. Which will have the largest heat of vaporization?

Answer 2

thought it was NaCl

Answer 3

Well the heat of vaporization correlates with the melting points. At room temperature Cl2 is a gas and H2O and HCl are both liquids. NaCl is a solid at room temp so wouldn't it have the highest heat of vaporization

Answer 4

oh. I see. so we take room temperature into account?

Answer 5

I noticed I tried looking this up (heat of vaporization for NaCl & wikipedia lmao says it doest have a value)

Answer 6

i did the same thing XD

Answer 7

no value

Answer 8

http://www.pleasanton.k12.ca.us/fhsweb/morris/APchem/ch%2010/Practice%20test%20MC.pdf idk if im allowed to post links but this one has similar compounds and states that NaCl has the highest heat of vaporization look at question 6

Answer 9

I'm coming up with nothing either for NaCl

Answer 10

@sweetburger i saw that problem don't get why though... maybe because it's a solid?

Answer 11

Well at room temp NaCl is a solid where all the others are liquids or gases

Answer 12

but it's heat of vaporization (l) --> (g) not heat of fusion.. don't know why i'm kind of confused.

Answer 13

I dont see how it could not be NaCl. It has a very large molecular mass compared to the other compounds in question except for which Cl2 has a higher mass but NaCl is in a strong lattice and Cl2 just has weak disperson forces holding it together. All together I dont see how NaCl would not have the highest H of Vaporization.

Answer 14

not sure if that logic is completely sound^ but its my attempt to reason

Answer 15

yes its (l)--->(g) and if some of the compounds are already liquids or gases and NaCl is a solid then it would be much harder to turn NaCl into a gas than the other compounds

Answer 16

*at room temperature

Answer 17

yeah your logic makes perfect sense man.. i just didn't understand why there was no value but both of you are right.

Answer 18

It's NaCl for sure.

Answer 19

ok I'm going to post another one

Answer 20

@sweetburger that last point helped me out a lot, like NaCl is a solid so it would be harder to vaporize it.

Answer 21

alright glad it helped :)